Add User Management features (Users, Roles, Permissions)

Added Filament Resources:
- UserResource: Enhanced with role assignment, password confirmation
- RoleResource: Manage roles with permission assignment
- PermissionResource: Manage individual permissions

Features:
- Users can be assigned multiple roles
- Roles can be assigned multiple permissions
- Color-coded badges for roles/permissions
- Filter users by role
- Prevent deletion of admin role
- User Management navigation group

src/app/Filament/Resources/RoleResource/Pages/ListRoles.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Filament\Resources\RoleResource\Pages;
+
+use App\Filament\Resources\RoleResource;
+use Filament\Actions;
+use Filament\Resources\Pages\ListRecords;
+
+class ListRoles extends ListRecords
+{
+    protected static string $resource = RoleResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\CreateAction::make(),
+        ];
+    }
+}