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.

Cargo.lock

@@ -2073,6 +2073,7 @@ dependencies = [
  "fff-search",
  "freedesktop-desktop-entry",
  "iced_accessibility",
+ "iced_winit",
  "image",
  "jiff",
  "libc",
@@ -6119,7 +6120,6 @@ dependencies = [
 [[package]]
 name = "smithay"
 version = "0.7.0"
-source = "git+https://github.com/Smithay/smithay?rev=8a270232f1bfc416c781273c98a3f52a812a0bba#8a270232f1bfc416c781273c98a3f52a812a0bba"
 dependencies = [
  "appendlist",
  "bitflags 2.13.2",