- Added per-user rate limiting functionality to control the minimum time between bot replies to the same user, identified by public key or sender name.
- Updated configuration files to include `per_user_rate_limit_seconds` and `per_user_rate_limit_enabled` options for enabling and configuring this feature.
- Enhanced the command manager and message handler to support per-user rate limiting, ensuring efficient message handling and reduced spam.
- Updated documentation to reflect the new rate limiting options and their usage.
- 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.
