feat: add version updater and statistics enhancements (fixes #29)

- Implemented version checking system with update notifications
- Integrated Git for fetching and downloading the latest version
- Added statistics updates
- Removed unused code across the project
- Condensed project structure
- Updated README
- Cleaned up UI

utils/configmanager.py

@@ -336,10 +336,3 @@ def load_env_json(key: str, default: str = "[]") -> Any:
         except Exception as e:
             logger.error(f"Failed to parse {key}: {e}")
             return json.loads(default)
-
-
-# Backwards compatibility aliases (deprecated - use get_system_value instead)
-get_protected_value = get_system_value
-get_protected_json = get_system_json
-load_protected_config = load_system_config
-PROTECTED_KEYS = SYSTEM_CONFIG_KEYS  # For backwards compatibility