- Settings class with singleton pattern
- Registered 5 settings: receiver_email, captcha_provider, captcha_site_key, captcha_secret_key, thankyou_url
- Proper sanitization callbacks for each setting type
- Helper method get_option() for clean API access
- Integrated with admin menu structure
- CPT init hook was being added from within parent init hook
- Changed to call register_post_type() directly from main init
- Removed redundant hook from CPT constructor
- Fixes CPT not registering on plugin activation
- WordPress plugin header with proper metadata
- Plugin version constants and paths
- Main Umzugsliste class with singleton pattern
- Activation/deactivation hooks with flush_rewrite_rules
- Autoloader for includes/ directory
- Init hook to initialize plugin components
