feat(radio): Enhance radio bot functionality and error handling

- Improve stream handling in play_station_callback
  * Replace lambda with defined function
  * Use bot.loop for thread-safe coroutine execution
  * Add more robust error handling

- Refactor !fix command
  * Resolve event loop issues
  * Replace asyncio.create_task with bot.loop.create_task
  * Implement informative embed messages
  * Improve stream restart reliability

- Add new !listradio command
  * Create command to list radio stations from config
  * Implement informative embed with station details
  * Support dynamic reading from configuration
  * Add error handling and user-friendly display

- Improve overall error management
  * More consistent async error handling
  * Better logging and user feedback
  * Enhanced stream restart mechanisms

Changes address:
- Stream restart reliability
- Error handling
- User experience
- Configuration management

Author: revunix