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/.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,21 @@
+name: Bug Report
+description: File a bug report
+type: bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+        Please don't use generative AI to generate the text of this issue.
+        See our [AI Policy](https://github.com/Smithay/smithay/blob/master/AI.md) for more information.
+  - type: checkboxes
+    id: terms
+    attributes:
+      label: AI Policy
+      options:
+        - label: I have read the [AI policy](https://github.com/Smithay/smithay/blob/master/AI.md).
+          required: true
+  - type: textarea
+    id: description
+    attributes:
+      label: Issue description