Add Spotify integration with improved token management and user interface

- Implemented Spotify OAuth handling in spotify_client_manager.py to ensure valid access tokens for users.
- Created helper functions in spotify_helper.py for refreshing tokens and retrieving user information.
- Developed manage_spotify.html template for connecting and managing Spotify accounts, displaying connection status and token information.
- Added logging for token management processes to enhance debugging and monitoring.
- Introduced a debug client for Spotify interactions to facilitate easier testing and development.

docker-compose.yml

@@ -41,7 +41,7 @@ services:
       - MAIL_RECIPIENT=${MAIL_RECIPIENT}
     restart: unless-stopped
     # Updated command with explicit extra-files and reload arguments
-    command: python -m flask run --host=0.0.0.0 --port=5000 --reload --extra-files ./templates:/app/templates,./static:/app/static
+    command: python -m flask run --host=0.0.0.0 --port=5000 --reload
 
   scheduler:
     image: mcuadros/ofelia:latest