feat: Implement multi-tenancy support in middleware and security layers

- Enhanced TenantMiddleware to validate tenant information from JWT tokens.
- Added LicenseValidationMiddleware to check tenant licenses before processing requests.
- Updated security utilities to extract tenant information from tokens and validate company access.
- Introduced CompanyStore to manage active company state and handle company switching in the frontend.
- Modified API routes to include company_id in requests for better resource management.
- Improved logging and error handling throughout the middleware and API layers.
- Updated frontend components to reflect changes in company management and selection.
- Added new API route for fetching user's companies with proper authentication handling.

backend/core/__init__.py

@@ -1,6 +1,7 @@
 """
 Core module - Configuración y utilidades centrales de la aplicación
 """
+
 from .config import settings
 from .database import (
     Base,
@@ -8,14 +9,14 @@ from .database import (
     get_async_core_db,
     get_tenant_db,
     init_db,
-    init_async_db
+    init_async_db,
 )
 from .security import (
     verify_token,
     get_current_user,
     get_current_active_user,
     has_role,
-    get_tenant_from_token
+    get_tenant_from_token,
 )
 
 __all__ = [