[Cleanup]adds handling for messages cont. emojis/links

[kablekompany]

Type

• Bugfix
• Enhancement
• New feature

Description of the changes

[p]cleanup emoji
[p]cleanup links

each default to searching for 10 messages respectively

Blocked by #4728 ([p]cleanup stickers)

[kablekompany]

Have made this change on my own red, and can confirm no false positives as of yet on link or emoji clearing (unicode emojis of course are not purged). Initially I had an alias with `cleanup text ":" to sort of target either but couldn't settle for one or the other, and it would always clean both. This has been tested in a moderation environment where chat speed is variable of 1-2msgs per second with enforced slowmode of 30s (so you can imagine the spam, ads, emoji overuse encountered).

Just wanted to validate positive test to date and provide operational stroke of proposed addition, regardless if there is intent or desire for use.

Thanks!

[Jackenmen]

This is not a review, I just had two things I wanted to mention. Feel free to ignore this until actual review comes up.

[kablekompany]

applied the noted changes (i think)
let me know if that diff is fucky (git is confusing for me at times 😓 )

[kablekompany]

moved emoji regex to core and added unicode emoji regex extracting to core as well
Can revert if these properties are not sufficient for core otherwise.

making the unicode regex accessible could open up use cases in automod filters or further expanding cleanup functions.

[kablekompany]

successfully got the git blame back on track

[kablekompany]

Added support for cleanup stickers

Cause those were a fantastic idea and definitely not spammed :XtoDoubt:

[kablekompany]

Will discontinue pulling in base unless otherwise expressed this is a potential wanted merge. Just to save us all some email notifs 😅

will rectify a final updated upstream when/if that review is requested. Cheers!