Add security_protection.rs with 8 new BASIC keywords:
- SECURITY TOOL STATUS - Check if tool is installed/running
- SECURITY RUN SCAN - Execute security scan
- SECURITY GET REPORT - Get latest scan report
- SECURITY UPDATE DEFINITIONS - Update signatures
- SECURITY START SERVICE - Start security service
- SECURITY STOP SERVICE - Stop security service
- SECURITY INSTALL TOOL - Install security tool
- SECURITY HARDENING SCORE - Get Lynis hardening index
Also:
- Registered protection routes in main.rs
- Added Security Protection category to keywords list
- All functions use proper error handling (no unwrap/expect)
- Add generate_secure_password() for OTP generation during admin bootstrap
- Display admin credentials (username/password) in console on first run
- Save credentials to ~/.gb-setup-credentials file
- Fix Zitadel client to support PAT token authentication
- Replace OAuth2 password grant with Zitadel Session API for login
- Fix get_current_user to fetch user data from Zitadel session
- Return session_id as access_token for proper authentication
- Set email as verified on user creation to skip verification
- Add password grant type to OAuth application config
- Update directory_setup to include proper redirect URIs
