Implement guild configuration

[No767]

Summary

This PR focuses on implementing an configuration system for guilds. The guild's configuration is entirely handled within the database itself. The configurations include these settings:

• Guild age and account ages
• Custom mentions for posts
• Anon replies, anon replies without commands, and other boolean options

This is inspired by ModMail's configuration system, but in an more compact and better way.

Warning

This PR may break Rodhaj as an whole. Most of the features should continue to work, but may have some faulty code that may need to be retested.

Tasks

There are some tasks that need to be completed, namely:

• Sorting for config options
• Separate age settings into different commands
• Add time parsing code (with timedeltas)
• JSON-based help documentation

Types of changes

What types of changes does your code introduce to Rodhaj
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (Updates to README.md, the documentation, etc)
• Other (if none of the other choices apply)

Checklist

Put an x in the boxes that apply

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes. (if appropriate)
• All workflows (except pre-commit.ci) pass with my new changes
• This PR does not address a duplicate issue or PR

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud