Add player functionality with HLS support and API integration

- Implemented a new Player class in player.js to handle audio playback, including HLS support using hls.js.
- Created a shared API module in api.js for making HTTP requests with proper error handling.
- Added DOM utility functions in dom.js for creating and clearing elements.
- Introduced WebSocket connection handling in ws.js for real-time updates.
- Developed a comprehensive CSS stylesheet for styling the application, including a high-contrast theme.

.env.example

@@ -0,0 +1,6 @@
+PORT=4173
+SESSION_SECRET=change-me-to-a-long-random-string
+DB_PATH=./data/db/oradio.sqlite
+ADMIN_BOOTSTRAP_USER=admin
+ADMIN_BOOTSTRAP_PASSWORD=changeme
+STREAM_CHECK_CRON=0 */6 * * *