Complete Task 1.3 - Authentication System Implementation

✅ Implemented comprehensive authentication system:
- Abstract AuthHandler base class with pluggable architecture
- APIKeyAuth for API key authentication (string auto-conversion)
- JWTAuth for JWT token authentication with expiration handling
- NoAuth for testing and public instances
- Full integration with WikiJSClient for automatic header management

🔧 Fixed packaging issues:
- Updated pyproject.toml with required project metadata fields
- Fixed utility function exports in utils/__init__.py
- Package now installs correctly in virtual environments

🧪 Validated with comprehensive tests:
- All authentication methods working correctly
- Proper error handling for invalid credentials
- Type validation and security features

📊 Progress: Phase 1 MVP Development now 60% complete
🎯 Next: Task 1.4 - Pages API implementation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

wikijs/utils/__init__.py

@@ -4,12 +4,20 @@ from .helpers import (
     normalize_url,
     sanitize_path,
     validate_url,
+    build_api_url,
     parse_wiki_response,
+    extract_error_message,
+    chunk_list,
+    safe_get,
 )
 
 __all__ = [
     "normalize_url",
     "sanitize_path", 
     "validate_url",
+    "build_api_url",
     "parse_wiki_response",
+    "extract_error_message",
+    "chunk_list",
+    "safe_get",
 ]