draft: embedded chat

Grantrequested to merge
feat/embedded-chat into main
  • emojis
  • custom emojis
  • stickers
  • reactions
  • attachments
  • external hooks for adding custom handlers for urls
  • urls -> pills
  • external hooks for formatting usernames
  • external hooks for clicking on a person
  • mentions -> pills
  • external hooks for notifications (mentions, invites)
  • external hook for opening room by id
  • external hook for creating/opening DM with handle
  • remind mobile users of mobile apps that can be used instead

Merge request reports