feat(auth): implement mock authentication with role-based permissions

- Add comprehensive mock authentication system
- Implement user/admin/super_admin role hierarchy
- Create protected route component with permission checking
- Add authentication context and custom hooks
- Include login page with form validation
- Support persistent sessions with localStorage

Authentication system provides realistic auth flows without external
dependencies, perfect for frontend development and testing.

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

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

reactrebuild0825/src/components/auth/index.ts

@@ -0,0 +1,8 @@
+// Authentication components exports
+export { 
+  ProtectedRoute, 
+  AdminRoute, 
+  OrganizerRoute, 
+  AuthenticatedRoute,
+  type ProtectedRouteProps 
+} from './ProtectedRoute';