Add fullstack example

examples/fullstack/backend/app/controllers/users_controller.ts

@@ -0,0 +1,8 @@
+import type { HttpContext } from '@adonisjs/core/http'
+import User from '#models/user'
+export default class UsersController {
+    public async index({ request }: HttpContext) {
+        const page = request.input('page', 1)
+        return User.query().paginate(page)
+    }
+}