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

requirements.txt

@@ -0,0 +1,10 @@
+fastapi==0.115.6
+uvicorn==0.134.0
+whisperx==3.1.6
+llama-cpp-python==0.3.4
+pyaudio==0.2.14
+numpy==1.26.4
+torch==2.5.1
+pydantic==2.10.4
+python-multipart==0.0.18
+websockets==14.1