feat: Implement staff management features; add controller, service, resource, routes, and tests for staff and category assignments

app/Domains/Staff/routes/api.php

@@ -0,0 +1,10 @@
+<?php
+
+use App\Domains\Staff\Controllers\AdminAppStaffController;
+use Illuminate\Support\Facades\Route;
+
+Route::prefix('v1/adminapp/tenant')
+    ->middleware(['auth:sanctum', 'adminapp.tenant'])
+    ->group(function (): void {
+        Route::apiResource('staff', AdminAppStaffController::class)->except('show');
+    });