feat: Enhance command help functionality with channel restrictions

- Updated the CommandManager to include channel restrictions for help keyword processing, ensuring that help requests are only handled in monitored channels or DMs when enabled.
- Improved the HTML documentation for commands by adding a new "General Commands" section and refining existing command descriptions.
- Added new CSS styles for better presentation of command subcommands in the website documentation.

modules/commands/base_command.py

@@ -30,6 +30,11 @@ class BaseCommand(ABC):
     cooldown_seconds: int = 0
     category: str = "general"
     
+    # Documentation fields - to be overridden by subclasses for website generation
+    usage: str = ""  # Usage syntax, e.g., "wx <zipcode|city> [tomorrow|7d|hourly|alerts]"
+    examples: List[str] = []  # Example commands, e.g., ["wx 98101", "wx seattle tomorrow"]
+    parameters: List[Dict[str, str]] = []  # Parameter definitions, e.g., [{"name": "location", "description": "US zip code or city name"}]
+    
     def __init__(self, bot):
         self.bot = bot
         self.logger = bot.logger