chore: prepare release 1.12.0 (#461)

> [!IMPORTANT]
> Merging this PR will create a new release.

## Features

* `Ctrl + K` search menu is now context aware and lists the current
space's rooms at the top.
([#499](#499) by @7w1)
* Add knocking support when attempting to join a room from the
directory, an address, a room mention, or space hierarchy, as well as
text command support for knocking. Also improves rendering for knock
notifications in rooms.
([#470](#470) by @polyjitter)
* Add Android/iOS PWA-specific icon variants.
([#473](#473) by @Septicity)
* Add support for youtube embeds.
([#497](#497) by
@thundertheidiot)
* Add sidebar three dot menu for quick access to related settings
([#474](#474) by @wolterkam)
* Replies that mention the OP are now indicated by the OP username being
prefixed with @ ([#465](#465)
by @mini-bomba)
* Made pin events show a tally of the messages that are pinned.
([#462](#462) by @nushea)

### Improve multiline composer and voice recording
([#476](#476) by @hazre)

- Add a multiline composer layout for longer drafts.
- Keep the voice recorder between composer actions in multiline mode.
- Show the recorder inside the composer on mobile while recording.
- Prevent the composer from expanding when recording starts.
- Make the recorder footer and waveform fit better across screen sizes.
- Let interrupted mobile recording gestures still stop correctly.
- Stabilize wrap detection around edge cases like narrow widths and
trailing spaces.

## Fixes

* Added error messages provided by homeserver to unknown login errors.
([#496](#496) by @7w1)
* Ensure new updates always reload the page properly.
([#502](#502) by @7w1)
* Removed the blocked users moved notice from notifications setting
page. ([#490](#490) by @7w1)
* Fix recieved encrypted message per-message profiles not triggering
rerenders. ([#464](#464) by
@7w1)
* Add `.m4a` files as a recognized audio type.
([#472](#472) by @henk717)
* Fix messages disappearing from rooms after reconnects and timeline
resets. ([#478](#478) by
@hazre)
* Fix Camera being enabled by default even when the client has it off
pre joining in browsers that permit the video (Electron/Tauri as
examples). ([#485](#485) by
@Rawrington)
* Fix cinny-dark-theme link colors being too dark
([#469](#469) by @Elec3137)
* Fix "Default" menu item height in room notification switcher.
([#466](#466) by @polyjitter)
* fix the issue of empty displaynames of a persona, causing an empty
fallback message, it will now ommit the fallback, if the name is empty
or only consists of whitespace
([#495](#495) by @dozro)
* Fixed an Android issue where recording a voice message with headphones
could leave audio stuck in low-quality mode until the app was restarted.
([#476](#476) by @hazre)
* Fixed voice message scrubbing/seeking on Firefox by switching the
recorder from WebM (no seek index) to Ogg/Opus.
([#476](#476) by @hazre)
* fixes touchpad zooming behaviour
([#481](#481) by
@integralfunction)
* Fixes width mismatch for the call chat view.
([#460](#460) by @polyjitter)
* Fix messages sent from sable showing wrong on other client(s)
([#468](#468) by @nushea)

## Documentation

* Updated PR template and CONTRIBUTING.md to add AI disclosure
requirement. ([#456](#456) by
@Rosy-iso)

Author: 7w1