feat: add username management system

app/Filament/Resources/Usernames/Pages/CreateUsername.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Filament\Resources\Usernames\Pages;
+
+use App\Filament\Resources\Usernames\UsernameResource;
+use Filament\Resources\Pages\CreateRecord;
+
+class CreateUsername extends CreateRecord
+{
+    protected static string $resource = UsernameResource::class;
+}