Implement Automod Features

[plun1331]

Summary

Implements some automod features

Based on discord/discord-api-docs#4873 (that's all there is)
Noticed a new PR with more information, discord/discord-api-docs#4860

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why
• 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, typehinting, examples, ...)

[codecov]

Codecov Report

Merging #1316 (7fc0fda) into master (44eb9a0) will increase coverage by 0.01%.
The diff coverage is 75.00%.

❗ Current head 7fc0fda differs from pull request most recent head 14af3cb. Consider uploading reports for the commit 14af3cb to get more accurate results

@@            Coverage Diff             @@
##           master    #1316      +/-   ##
==========================================
+ Coverage   33.42%   33.43%   +0.01%     
==========================================
  Files          93       93              
  Lines       17606    17612       +6     
==========================================
+ Hits         5885     5889       +4     
- Misses      11721    11723       +2     

Flag	Coverage Δ
pytest	33.43% <75.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
discord/guild.py	24.31% <ø> (ø)
discord/enums.py	78.32% <66.66%> (-0.14%)	⬇️
discord/types/embed.py	100.00% <100.00%> (ø)
discord/types/message.py	98.83% <100.00%> (ø)

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[ghost]

Suggesting an on_automod_alert event that allows for custom automod alerts, logging or auto-mute if it meets a certain rule

[plun1331]

Suggesting an on_automod_alert event that allows for custom automod alerts, logging or auto-mute if it meets a certain rule

Such an event would have to be implemented into the Discord gateway for bots to receive, so it's up to Discord to make that possible.
Discord already handles logging and blocking messages for you as well.

[Middledot]

The enums and new AuditLogActions should be documented too