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.

scripts/installer/inventory.json

@@ -6,6 +6,7 @@
     "feresectl",
     "ferese-lock",
     "ferese-polkit-agent",
+    "ferese-rime",
     "xdg-desktop-portal-ferese"
   ],
   "files": [
@@ -50,6 +51,17 @@
       "mode": "0755",
       "link": true
     },
+    {
+      "source": "target/release/ferese-rime",
+      "target": "ferese-rime",
+      "mode": "0755",
+      "link": true
+    },
+    {
+      "source": "packaging/rime/default.custom.yaml",
+      "target": "rime/default.custom.yaml",
+      "mode": "0644"
+    },
     {
       "source": "target/release/xdg-desktop-portal-ferese",
       "target": "xdg-desktop-portal-ferese",