feat: add meeting transcription app scaffolding

- Add Python backend structure with FastAPI for transcription/summarization
- Add React UI with audio recording, transcript, and summary views
- Configure Tauri to manage Python backend lifecycle
- Set up Windows cross-compilation with cargo-xwin
- Add Gitea CI workflow for lint, test, and multi-platform builds
- Configure ESLint, Prettier, and Vitest for code quality

Note: App scaffolding only - Python env and models not yet set up

src-tauri/capabilities/default.json

@@ -3,8 +3,5 @@
   "identifier": "default",
   "description": "Capability for the main window",
   "windows": ["main"],
-  "permissions": [
-    "core:default",
-    "opener:default"
-  ]
+  "permissions": ["core:default", "opener:default"]
 }