Maintenance update (#7)

- Use modern tooling uv and bun
- Various changes to work with latest PyAV and PIL that have changed their API
- Improved image, video and document previews (uses AVIF, renders AVIF/HEIC/videos in HDR, faster processing)
- Fix a server hang in some cases where a folder was moved or renamed
- Log exceptions instead of only returning 500 response to client
- Log timing of preview generation functions
- Default to quality 50 in previews (previously 40)

frontend/vite.config.ts

@@ -8,7 +8,7 @@ import svgLoader from 'vite-svg-loader'
 import Components from 'unplugin-vue-components/vite'
 
 // Development mode:
-// npm run dev           # Run frontend that proxies to dev_backend
+// bun run dev           # Run frontend that proxies to dev_backend
 // cista -l :8000 --dev  # Run backend
 const dev_backend = {
   target: "http://localhost:8000",