Gomuks

Release post:

### Backend
* Bumped minimum Go version to 1.26.
* Added support for handling push notifications from homeserver.
* This is meant for clients that use gomuks as an SDK. The web frontend won't use it.
* Added support for accounts with a broken default SSSS key ID (likely caused by setting up encryption with fluffychat).
* Added `--update` flag to update the current backend binary and exit.
* Added preview text to locally calculated content of events and stopped mutating the raw content to remove fallbacks.
* Added callback-based async methods to the C FFI.
* Switched macOS CI builds to use goolm.
* Fixed room sorting timestamp being bumped by all encrypted events instead of only messages.

### Web
* Added swipe to reply.
* Added support for jumping to raw event IDs using `/join`.
* Added button to copy `/raw` command including per-message profile in event source view.
* Added `/version` command to check the current gomuks version.
* Added app identifier to outgoing messages.
* Added compact room list option.
* Adjusted padding of composer and room list entries, and fixed alignment of unread counters.
* Changed room names in room list to be less