Implement Learn UI from Figma Part 1 (ocaml#1798)

* Figma colors tailwind.config.js, old colors->legacy, tutorial block, hero section
* split hero background in background and camel, scale background
* remove featured+rating on book, book difficulty variant type, lang manual banner draft, books block draft
* add two more book recommendations
* exercises block
* language manual banner background
* better book recommendation text
* move industrial user success story card to template
* platform tools section learn landing, rename legacy cards class
* update border color from Figma, adjust card hover shadow, transform paper cards to new class
* refactor footer
* refactor learn_sidebar into learn_layout
* buttons from design system, substitute legacy primary by new primary, books page
* exercises.eml
* legacy primary-600 and primary-700 to new primary color

data/books/apprendre-a-programmer-avec-ocaml.md

@@ -20,7 +20,6 @@ isbn: "2-21213-678-1"
 links:
   - description: Buy on Amazon.fr
     uri: https://www.amazon.fr/Apprendre-programmer-avec-Ocaml-Algorithmes/dp/2212136781/
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/apprentissage-de-la-programmation-avec-ocaml.md

@@ -18,7 +18,6 @@ isbn: "2-7462-0819-9"
 links:
   - description: Buy on Amazon.fr
     uri: https://www.amazon.com/apprentissage-programmation-avec-ocaml/dp/2746208199
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/developpement-d-applications-avec-objective-caml.md

@@ -20,7 +20,6 @@ links:
     uri: https://caml.inria.fr/pub/docs/oreilly-book/
   - description: Order at Amazon.fr
     uri: https://www.amazon.fr/exec/obidos/ASIN/2841771210
-featured: false
 difficulty: intermediate
 pricing: free
 ---

data/books/initiation-a-la-programmation-fonctionnelle-en-ocaml.md

@@ -14,7 +14,6 @@ isbn: "9782332978400"
 links:
   - description: Website
     uri: https://www.edilivre.com/initiation-a-la-programmation-fonctionnelle-en-ocaml-mohammed-said-habet.html
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/introduction-to-functional-programming-and-the-structure-of-programming-languages-using-ocaml.md

@@ -16,8 +16,6 @@ links:
     uri: https://github.com/uds-psl/Prog
   - description: PDF download
     uri: https://www.ps.uni-saarland.de/~smolka/drafts/prog2021.pdf
-rating: 5
-featured: false
 difficulty: beginner
 pricing: free
 ---

data/books/introduzione-alla-programmazione-funzionale.md

@@ -14,7 +14,6 @@ isbn: "88-7488-031-6"
 links:
   - description: Order at Amazon.it
     uri: https://www.amazon.it/Introduzione-programmazione-funzionale-Marta-Cialdea/dp/8874880316
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/more-ocaml-algorithms-methods-diversions.md

@@ -6,7 +6,7 @@ description: >
   programming with OCaml, introducing various language features and describing
   some classic algorithms.
 recommendation: >
-  This book covers topics like laziness, compression, generating PDFs, and more. A basic understanding of OCaml is required.
+  "More OCaml" by John Whitington explores OCaml's functional programming and algorithms, concluding with a PDF file project. Tailored for both existing OCaml programmers and those new to the language, it includes exercises with answers. The book starts with an OCaml fundamentals summary, making it accessible and informative for a diverse readership.
 authors:
   - John Whitington
 published: 2014-08-26
@@ -16,8 +16,6 @@ language:
 links:
   - description: Buy on Amazon
     uri: https://www.amazon.com/gp/product/0957671113
-rating: 5
-featured: false
 difficulty: intermediate
 pricing: paid
 ---

data/books/nyumon-ocaml.md

@@ -11,7 +11,6 @@ language:
 links:
   - description: Order at Amazon.co.jp
     uri: https://www.amazon.co.jp/%E5%85%A5%E9%96%80OCaml-%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0%E5%9F%BA%E7%A4%8E%E3%81%A8%E5%AE%9F%E8%B7%B5%E7%90%86%E8%A7%A3-OCaml-Nagoya/dp/4839923116
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/ocaml-from-the-very-beginning.md

@@ -5,7 +5,8 @@ description: >
   In "OCaml from the Very Beginning" John Whitington takes a
   no-prerequisites approach to teaching a modern general-purpose
   programming language.
-recommendation: "Suitable for formal use within an academic curriculum, and for the interested amateur."
+recommendation: >
+  John Whitington's "OCaml from the Very Beginning" is a beginner-friendly guide to learning OCaml, a modern programming language. The book gradually introduces concepts in concise chapters, with exercises and answers. It's suitable for both novice and experienced programmers, and can be used in academic settings or for self-study.
 authors:
   - John Whitington
 published: 2013-06-07 
@@ -17,8 +18,6 @@ links:
     uri: https://ocaml-book.com/
   - description: Buy on Amazon
     uri: https://www.amazon.com/gp/product/0957671105
-rating: 4
-featured: true
 difficulty : beginner
 pricing: free
 ---

data/books/ocaml-programming-correct-beautiful-efficient.md

@@ -5,7 +5,8 @@ description: >
   A textbook on functional programming and data structures in OCaml, with an
   emphasis on semantics and software engineering. This book is the textbook for
   CS 3110 Data Structures and Functional Programming at Cornell University.
-recommendation: "Basic experience in some imperative programming language is helpful. Includes over 200 videos."
+recommendation: >
+  This textbook, used in a third-semester Cornell course, teaches functional programming and data structures in OCaml, emphasizing semantics and software engineering. Suitable for students with Python and Java backgrounds, it requires some imperative language skills and basic discrete mathematics. The book includes over 200 YouTube videos as supplementary or alternative learning resources.
 authors:
   - Michael R. Clarkson
 published: 2023-08-14
@@ -15,8 +16,6 @@ language:
 links:
   - description: Read Online
     uri: https://cs3110.github.io/textbook/
-rating: 5
-featured: true
 difficulty: beginner
 pricing: free
 ---

data/books/ocaml-scientific-computing.md

@@ -4,6 +4,8 @@ slug: "ocaml-scientific-computing"
 description: >
   Shows how the expressiveness of OCaml allows for fast and safe
   development of data science applications.
+recommendation: >
+  This book merges functional programming in OCaml with numerical computation, tailored for data science and AI. It's ideal for those familiar with functional programming, offering a mix of foundational concepts and advanced cloud computing techniques. The structure allows readers to choose topics of interest, making it a versatile guide for learning and applying scientific computing.
 authors:
   - Liang Wang
   - Jianxin Zhao
@@ -17,7 +19,6 @@ links:
     uri: https://link.springer.com/book/10.1007/978-3-030-97645-3
   - description: Buy on Amazon
     uri: https://www.amazon.com/gp/product/3030976440
-featured: true
 difficulty: advanced
 pricing: paid
 ---

data/books/ocaml-yuyan-biancheng-jichu-jiaocheng.md

@@ -11,7 +11,6 @@ language:
 links:
   - description: Order at Epubit.com
     uri: https://www.epubit.com/bookDetails?id=N18159
-featured: false
 difficulty: beginner
 pricing: paid
 ---

data/books/programmation-de-droite-a-gauche-et-vice-versa.md

@@ -13,6 +13,6 @@ isbn: "978-2-916466-05-7"
 links:
   - description: Order on Paracamplus
     uri: https://www.decitre.fr/livres/programmation-de-droite-a-gauche-et-vice-versa-9782916466064.html
-featured: false
+difficulty: intermediate
 pricing: paid
 ---

data/books/puroguramingu-in-ocaml.md

@@ -11,6 +11,6 @@ language:
 links:
   - description: Order at Amazon.co.jp
     uri: https://www.amazon.co.jp/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0-OCaml-%E3%80%9C%E9%96%A2%E6%95%B0%E5%9E%8B%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0%E3%81%AE%E5%9F%BA%E7%A4%8E%E3%81%8B%E3%82%89GUI%E6%A7%8B%E7%AF%89%E3%81%BE%E3%81%A7%E3%80%9C-%E4%BA%94%E5%8D%81%E5%B5%90%E6%B7%B3-ebook/dp/B00QRPI1AS
-featured: false
+difficulty: intermediate
 pricing: paid
 ---

data/books/real-world-ocaml.md

@@ -6,7 +6,7 @@ description: >
   computation, system scripting, and database-driven web applications with
   the OCaml multi-paradigm programming language.
 recommendation: >
-  Suitable for people with some imperative programming experience. Hands-on code examples using real world scenerios.
+  This practical book guides through using OCaml for real-world problems in data processing and web applications, covering its various programming styles with real examples. It starts with basics and advances to topics like the module system and foreign-function interface, focusing on efficient coding using the Jane Street core library.
 authors:
   - Anil Madhavapeddy
   - Yaron Minsky
@@ -17,8 +17,6 @@ language:
 links:
   - description: Read Online
     uri: https://realworldocaml.org/
-rating: 4
-featured: true
 difficulty: intermediate
 pricing: free
 ---

data/books/think-ocaml-how-to-think-like-a-functional-programmer.md

@@ -13,7 +13,6 @@ language:
 links:
   - description: Read Online
     uri: https://greenteapress.com/thinkocaml/thinkocaml.pdf
-featured: false
 difficulty : beginner
 pricing: free
 ---

data/exercises/001_tail.md

@@ -1,6 +1,6 @@
 ---
 title: Tail of a List
-number: "1"
+slug: "1"
 difficulty: beginner
 tags: [ "list" ]
 description: "Write a function that returns the last element of a list."

data/exercises/002_tail_penultimate.md

@@ -1,6 +1,6 @@
 ---
 title: Last Two Elements of a List
-number: "2"
+slug: "2"
 difficulty: beginner
 tags: [ "list" ]
 description: "Find the last and penultimate elements of a list."

data/exercises/003_nth_element.md

@@ -1,6 +1,6 @@
 ---
 title: N'th Element of a List
-number: "3"
+slug: "3"
 difficulty: beginner
 tags: [ "list" ]
 description: "Find the N'th element of a list."

data/exercises/004_length_of_list.md

@@ -1,6 +1,6 @@
 ---
 title: Length of a List
-number: "4"
+slug: "4"
 difficulty: beginner
 tags: [ "list" ]
 description: "Find the number of elements of a list."

data/exercises/005_reverse_list.md

@@ -1,6 +1,6 @@
 ---
 title: Reverse a List
-number: "5"
+slug: "5"
 difficulty: beginner
 tags: [ "list" ]
 description: "Write a function to reverse a list."

data/exercises/006_palindrome.md

@@ -1,6 +1,6 @@
 ---
 title: Palindrome
-number: "6"
+slug: "6"
 difficulty: beginner
 tags: [ "list" ]
 description: "Find out whether a list is a palindrome."

data/exercises/007_flatten_list.md

@@ -1,6 +1,6 @@
 ---
 title: Flatten a List
-number: "7"
+slug: "7"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Write a function that flattens a nested list structure represented by the 'a node type."

data/exercises/008_remove_duplicates.md

@@ -1,6 +1,6 @@
 ---
 title: Eliminate Duplicates
-number: "8"
+slug: "8"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Eliminate consecutive duplicates of list elements."

data/exercises/009_pack_duplicates.md

@@ -1,6 +1,6 @@
 ---
 title: Pack Consecutive Duplicates
-number: "9"
+slug: "9"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Pack consecutive duplicates of list elements into sublists."

data/exercises/010_run_length_encoding.md

@@ -1,6 +1,6 @@
 ---
 title: Run-Length Encoding
-number: "10"
+slug: "10"
 difficulty: beginner
 tags: [ "list" ]
 description: "Performs run-length encoding on a list"

data/exercises/011_modified_run_length.md

@@ -1,6 +1,6 @@
 ---
 title: Modified Run-Length Encoding
-number: "11"
+slug: "11"
 difficulty: beginner
 tags: [ "list" ]
 description: "Modify run-length encoding to include single elements and (count, element) pairs."

data/exercises/012_run_length_decoding.md

@@ -1,6 +1,6 @@
 ---
 title: Decode a Run-Length Encoded List
-number: "12"
+slug: "12"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Reconstruct the uncompressed list from a run-length code list."

data/exercises/013_run_decoding_direct.md

@@ -1,6 +1,6 @@
 ---
 title: Run-Length Encoding of a List (Direct Solution)
-number: "13"
+slug: "13"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Perform run-length encoding directly by counting duplicates and simplifying the result list."

data/exercises/014_duplicate_elements.md

@@ -1,6 +1,6 @@
 ---
 title: Duplicate the Elements of a List
-number: "14"
+slug: "14"
 difficulty: beginner
 tags: [ "list" ]
 description: "Write a function that duplicates the elements of a list."

data/exercises/015_replicate_elements.md

@@ -1,6 +1,6 @@
 ---
 title: Replicate the Elements of a List a Given Number of Times
-number: "15"
+slug: "15"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Write a function that replicates the elements of a list a given number of times."

data/exercises/016_drop_elements.md

@@ -1,6 +1,6 @@
 ---
 title: Drop Every N'th Element From a List
-number: "16"
+slug: "16"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Write a function that drops every N'th element from a list."

data/exercises/017_split_list.md

@@ -1,6 +1,6 @@
 ---
 title: Split a List Into Two Parts; The Length of the First Part Is Given
-number: "17"
+slug: "17"
 difficulty: beginner
 tags: [ "list" ]
 description: "Split a list into two parts, with the length of the first part specified."

data/exercises/018_extract_slice.md

@@ -1,6 +1,6 @@
 ---
 title: Extract a Slice From a List
-number: "18"
+slug: "18"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Extract a slice of a list between indices i and k, both inclusive, using 0-based indexing."

data/exercises/019_rotate_list.md

@@ -1,6 +1,6 @@
 ---
 title: Rotate a List N Places to the Left
-number: "19"
+slug: "19"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Write a function that rotates a list N places to the left."

data/exercises/020_remove_nth_element.md

@@ -1,6 +1,6 @@
 ---
 title: Remove the K'th Element From a List
-number: "20"
+slug: "20"
 difficulty: beginner
 tags: [ "list" ]
 description: "Create a function to remove the K'th element from a list (0-based index)."

data/exercises/021_insert_element.md

@@ -1,6 +1,6 @@
 ---
 title: Insert an Element at a Given Position Into a List
-number: "21"
+slug: "21"
 difficulty: beginner
 tags: [ "list" ]
 description: "Insert an element at a specified position (0-based index) within a list."

data/exercises/022_create_list.md

@@ -1,6 +1,6 @@
 ---
 title: Create a List Containing All Integers Within a Given Range
-number: "22"
+slug: "22"
 difficulty: beginner
 tags: [ "list" ]
 description: "Generate a list of integers in ascending order from A to B, and in descending order if A is greater than B."

data/exercises/023_extract_random.md

@@ -1,6 +1,6 @@
 ---
 title: Extract a Given Number of Randomly Selected Elements From a List
-number: "23"
+slug: "23"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Randomly select N elements from a list."

data/exercises/024_lotto.md

@@ -1,6 +1,6 @@
 ---
 title: "Lotto: Draw N Different Random Numbers From the Set 1..M"
-number: "24"
+slug: "24"
 difficulty: beginner
 tags: [ "list" ]
 description: "Draw N different random numbers from the set 1..M."

data/exercises/025_generate_permutations.md

@@ -1,6 +1,6 @@
 ---
 title: Generate a Random Permutation of the Elements of a List
-number: "25"
+slug: "25"
 difficulty: beginner
 tags: [ "list" ]
 description: "Generate a random permutation of the elements in the given list."

data/exercises/026_generate_combinations.md

@@ -1,6 +1,6 @@
 ---
 title: Generate the Combinations of K Distinct Objects Chosen From the N Elements of a List
-number: "26"
+slug: "26"
 difficulty: intermediate
 tags: [ "list" ]
 description: "Generate all possible combinations of K distinct objects chosen from a list of N elements."