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.

packaging/ferese-session

@@ -33,6 +33,18 @@ unset WAYLAND_SOCKET
 if [[ $backend == drm ]]; then
     unset DISPLAY WAYLAND_DISPLAY
     export FERESE_SESSION_IMPORT_ENV=1
+    # This fork owns its native input-method service. Keep GNOME's IBus settings
+    # outside this session, including apps launched later through activation.
+    export FERESE_ENABLE_INPUT_METHOD=${FERESE_ENABLE_INPUT_METHOD:-1}
+    if [[ $FERESE_ENABLE_INPUT_METHOD == 1 ]]; then
+        # GTK selects its IM module from the actual GDK backend. Forcing its
+        # Wayland module crashes GTK3 consumers that initialize an X11 display.
+        unset GTK_IM_MODULE
+        export QT_IM_MODULE=wayland QT_IM_MODULES=wayland
+        export IBUS_ADDRESS=
+        unset SDL_IM_MODULE
+        export FERESE_RIME_CONTROL=${FERESE_RIME_CONTROL:-$XDG_RUNTIME_DIR/ferese/rime-control.sock}
+    fi
 else
     export FERESE_SESSION_IMPORT_ENV=0
 fi