Integrate native Rime and stabilize input, output, and rendering

- Add optional modifier-only Super binding whose tap is cancelled by
  other input, focus changes, grabs, locks, and session teardown.
- Ship the native ferese-rime user service, Rime defaults, installer
  inventory, package dependencies, session environment, and docs.
- Vendor Smithay 8a27023 with the SHM texture-cache format fix and add
  GPU regressions for format changes and resize snapshots.
- Release reused CRTC owners before staging output modes, then restore
  changed outputs before former owners when a transaction fails.
- Wait for resize-capture GPU completion, expand filtered surface
  damage, and preserve IME popup origin under fractional scaling.
- Mark weekends like holidays in both calendar layouts.

vendor/smithay/smithay-drm-extras/README.md

@@ -0,0 +1,9 @@
+# Smithay DRM Extras
+
+This crate contains some extra abstractions and helpers over DRM
+
+- `display_info` module is responsible for extraction of information from DRM connectors (`model` and `manufacturer`) 
+- `drm_scanner` module contains helpers for detecting connector connected and disconnected events as well as mapping crtc to them.
+  - `ConnectorScanner` is responsible for tracking connected/disconnected events.
+  - `CrtcMapper` trait and `SimpleCrtcMapper` are meant for mapping crtc to connector.
+  - `DrmScanner<CrtcMapper>` combines two above into single abstraction. If it does not fit your needs you can always drop down to using `ConnectScanner` alone.