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.toml

@@ -21,6 +21,7 @@ members = [
     "portal",
 ]
 resolver = "3"
+exclude = ["vendor/smithay"]
 
 [workspace.package]
 version = "0.1.0"
@@ -72,3 +73,6 @@ wayland-client = "0.31.15"
 wayland-scanner = "0.31.11"
 wayland-server = "0.31.14"
 wayland-protocols-wlr = { version = "0.3.12", features = ["client"] }
+
+[patch."https://github.com/Smithay/smithay"]
+smithay = { path = "vendor/smithay" }