Link Preview, Reactions, Navigation Drawer UI

* Iniitial link preview UI
* Many link preview metadata fixes
* More traditional reactions UI
* Add navigation drawer with account and tag filters
* @mention autocomplete UI
* Nicer emoji autocomplete UI
* Android 15 related fixes
* Support /me in replies
* Show banned channel members to admins (so they can unban)
* Allow correcting any message, not just most recent
* Don't autolink inside escaped or codeblocks
* More prominent notice in UI of disconnected account
* Retry account creation when there's no internet
* Button to show your own QR code from the QR scanner
* Put a warning label on the force channel binding setting
* Do not show muted messages as unread
* Do not notify when a nick is mentioned only in a quote
* Always get recent messages when re-joining a channel when available
* Remove displayed gateway contacts when removing the gateway
* WebXDC: fix internal links
* Cache known gateways