Mock command functionality

[sjkd23]

• Checks if its in DMs
• Checks every message for if the author is in the mockTargets[] array
• Deletes the targets messages and replaces it in the SpongeBob text format

I'm creating a few PRs with all my changes in separate Repos, so sorry for the email spam.

[sjkd23]

Improved documentation thanks to ChatGPT. lmk if you want me to write my own instead, but it was just better than mine lol.