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

.prettierignore

@@ -0,0 +1,8 @@
+build/
+.svelte-kit/
+dist/
+src-tauri/target/
+src-tauri/gen/
+node_modules/
+.pnpm-store/
+pnpm-lock.yaml