Refactor command handling and enhance plugin validation

- Removed redundant command list in config example for clarity.
- Improved plugin validation by adding checks for required attributes and types, ensuring better error handling during plugin instantiation.
- Enhanced rate limiter classes to track total sends and throttled attempts, providing statistics for better monitoring.
- Updated command implementations to include metadata for better organization and clarity in command handling.

modules/commands/sun_command.py

@@ -11,9 +11,14 @@ from ..models import MeshMessage
 class SunCommand(BaseCommand):
     """Command to get sun information"""
     
+    # Plugin metadata
+    name = "sun"
+    keywords = ['sun']
+    description = "Get sunrise/sunset times"
+    category = "solar"
+    
     def __init__(self, bot):
         super().__init__(bot)
-        self.keywords = ['sun']
     
     async def execute(self, message: MeshMessage) -> bool:
         """Execute the sun command"""