Add markdown text formatting guide

page_content/learn_code/Markdown/2-Text_Formatting.mdx

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+---
+title: "Text formatting in Markdown"
+---
+
+# Headings
+
+Using headings in Markdown has a much nicer syntax than that in HTML, all you
+need is the hash symbol (`#`).
+
+The number of hashes corresponds to the `h` value in HTML. So `#` is for a
+`<h1>`, `##` is for a `<h2>` and so on.
+
+You add text to these headings by adding a space after the symbol then putting
+whatever you want the title to be
+
+```md
+# This is the top level heading
+
+## This is the second level
+
+### Third level
+
+###### And like HTML, it goes all the way down to 6
+```
+
+# Text styling
+
+## Bold
+
+For bold text there are two ways of formatting it, either with stars or
+underscores. Unlike in HTML, these do exactly the same thing and so are just
+personal preference. The only thing to remember is that there should be **two**
+of the symbol on each side
+
+```md
+**This is bold**
+```
+
+## Italic
+
+Italics have very similar syntax, with the option of stars or underscores, but
+just with **one** symbol on each side
+
+```md
+_This is italic_
+```
+
+You will notice that I have done the two examples with different symbols, this
+is due to my code formatter, but is a good idea so that you can do things such
+as:
+
+```md
+**This is bold _but with italic inside_ **
+```
+
+with less confusion