feat: add initial implementation of Kitchen CRM with authentication and dashboard features

- Create global styles and theme management
- Implement app shell layout with sidebar navigation
- Add authentication layout and pages for login and registration
- Develop dashboard page with placeholder content
- Introduce routing guards for guest-only and authenticated routes
- Set up Zustand for state management of authentication and theme
- Create API types and structures for CRM entities
- Configure Vite with PWA support and Tailwind CSS

frontend/src/features/organizations/api.ts

@@ -0,0 +1,4 @@
+import { apiClient } from '@/lib/api-client'
+import type { Organization } from '@/types/crm'
+
+export const listOrganizations = () => apiClient.get<Organization[]>('/organizations/me')