Add LabGuard to the list of cogs to help fight spambots and other bot methods

[rebrch]

Initial Checklist

• Has @tigattack been added as a reviewer?
• If applicable, have the relevant project(s), milestone(s), and label(s) been applied?
• If applicable, have you added details of the cog to the readme as per README.md?

Details

Does this resolve an issue?
Resolves ongoing issues with spam bots and bot accounts joining. Often times these accounts and posts are missed, so this would automatically catch and bonk these bots and/or compromised accounts.

Changes

Features / Fixes

• Adds feature labguard which is a cog enforcing the above.

Breaking Changes

• None

Additional

None.

[rebrch]

started project with claude assitance but the fixes were manual in line with docs, googling, and other projects.

actually trying to "learn" python so this was my first attempt at trying to build it out using claude where i couldn't figure something out.