emoji request feature

[breadguyyy]

Summary

for users without emoji management permissions, replace the "import emoji" button with a "request emoji" button that notifies people with emoji permissions.

it would need anti-spam measures in place like daily rate limits, server-side toggle, or limiting request permission to certain roles.

Purpose

makes it simple for users and mods to request and add external custom emojis.

Do you want to implement this feature yourself?

• [ ] Yes, I will implement this by myself and send a pull request

[breadguyyy]

also I suppose would be nice if there was a way to download emoji pngs