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.

deploy/oradio.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Online Radio Explorer
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=pi
+WorkingDirectory=/home/pi/onlineRadioExplorer
+EnvironmentFile=/home/pi/onlineRadioExplorer/.env
+ExecStart=/usr/bin/node server/index.js
+Restart=on-failure
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target