Migrates Sir Lancebot And Python To Poetry

Updates the Python and Sir Lancebot guides to use poetry. Updates the
dependency guide to include poetry, and explain when each dependency
manager should be used.

pydis_site/apps/content/resources/guides/pydis-guides/contributing/bot.md

@@ -6,9 +6,9 @@ toc: 1
 ---
 
 # Requirements
-* [Python 3.8](https://www.python.org/downloads/)
-* [Pipenv](https://github.com/pypa/pipenv#installation)
-    * `pip install pipenv`
+* [Python 3.9](https://www.python.org/downloads/)
+* [Poetry](https://github.com/python-poetry/poetry#installation)
+    * `pip install poetry`
 * [Git](https://git-scm.com/downloads)
     * [Windows](https://git-scm.com/download/win)
     * [MacOS](https://git-scm.com/download/mac) or `brew install git`
@@ -181,7 +181,7 @@ Running on the host is particularly useful if you wish to debug the bot.
 The site has to have been started somehow beforehand.
 
 ```shell
-pipenv run start
+poetry run task start
 ```
 
 ---

pydis_site/apps/content/resources/guides/pydis-guides/contributing/installing-project-dependencies.md

@@ -28,12 +28,18 @@ You should have already cloned your fork as described in [**Cloning a Repository
 ---
 
 ## Installing dependencies with the command line
-1. Make sure you are in the project directory.
-2. Install project and development dependencies:
+1. Make sure you are in the root project directory. This directory will always have a file titled `README.md`.
+2. Install project and development dependencies. Remember to also set up pre-commit hooks to ensure your pushed commits will never fail linting.
+---
+
+- Site:
 ```shell
 $ pipenv sync --dev
+$ pipenv run precommit
 ```
-* Remember to also set up pre-commit hooks to ensure your pushed commits will never fail linting:
+
+- Other projects:
 ```shell
-$ pipenv run precommit
+$ poetry install
+$ poetry run task precommit
 ```

pydis_site/apps/content/resources/guides/pydis-guides/contributing/sir-lancebot.md

@@ -9,8 +9,8 @@ toc: 1
 
 ---
 # Requirements
-- [Python 3.8](https://www.python.org/downloads/)
-- [Pipenv](https://github.com/pypa/pipenv/blob/master/docs/install.rst#-installing-pipenv)
+- [Python 3.9](https://www.python.org/downloads/)
+- [Poetry](https://github.com/python-poetry/poetry#installation)
 - [Git](https://git-scm.com/downloads)
     - [Windows Installer](https://git-scm.com/download/win)
     - [MacOS Installer](https://git-scm.com/download/mac) or `brew install git`
@@ -101,10 +101,10 @@ If you get any Docker related errors, reference the [Possible Issues](./docker/p
 {: .notification .is-warning }
 
 ## Run on the host
-After installing project dependencies use the pipenv command `pipenv run start` in the project root.
+After installing project dependencies use the poetry command `poetry run task start` in the project root.
 
 ```shell
-$ pipenv run start
+$ poetry run task start
 ```
 
 ---