feat: Implement user-branch relationship and update user management views

- Added a many-to-many relationship between users and branches in User model.
- Updated user creation and editing views to support multiple branch selection.
- Modified user index view to display associated branches.
- Created UserBranch model to manage user-branch associations.
- Added migration for user_branches table with foreign key constraints.
- Implemented seeder to populate user_branches based on existing user branch data.

Run this command:
- php artisan migrate
- php artisan module:seed Usermanagement --class=UserBranchesSeeder

resources/views/users/index.blade.php

@@ -160,7 +160,10 @@
                 branch: {
                     title: 'Branch',
                     render: (item, data) => {
-                        return data.branch?.name || '-';
+                        if (data.branches && data.branches.length > 0) {
+                            return data.branches.map(b => b.name).join(', ');
+                        }
+                        return '-';
                     },
                 },
                 role: {