Added fetching of cog modules and cog classes

[MoistBiscuits]

Summary

Automatic documentation.json generation for #203
Adds GenerateDoc.py which searches the cogs folder to create documentation.json automatically

Checklist

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

• Have you tested the changes? (pytest & dpytest)
• Have you followed PEP-8 for naming and styling?
• Has your code been properly documented with RestructuredText docstrings?
• Have you added your changes to CHANGELOG.md under the [Unreleased] heading?
• If your code added new bot commands, have you updated documentation.json?

• All of this code is your own, or follows the author repo's licence.

[codecov]

Codecov Report

Merging #235 (ac6ea00) into master (d666525) will increase coverage by 0.30%.
The diff coverage is 96.42%.

@@            Coverage Diff             @@
##           master     #235      +/-   ##
==========================================
+ Coverage   82.28%   82.58%   +0.30%     
==========================================
  Files          26       28       +2     
  Lines        6457     6597     +140     
==========================================
+ Hits         5313     5448     +135     
- Misses       1144     1149       +5     

Flag	Coverage Δ
unittests	82.58% <96.42%> (+0.30%)	⬆️

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Impacted Files	Coverage Δ
GenerateDoc.py	94.89% <94.89%> (ø)
KoalaBot.py	81.91% <100.00%> (+0.39%)	⬆️
tests/test_GenerateDoc.py	100.00% <100.00%> (ø)

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[MoistBiscuits]

Really sorry about the commit spam, was having a lot of issues with github actions, should hopefully be working by now

[MoistBiscuits]

GeneratDoc.py is finished and the github actions should be setup to update Documentation.json whenever a commit is made to a pull request, but I'm open to different implementations of when to trigger document generation