feat: implement user registration functionality with validation and response handling

app/Domains/Auth/Requests/RegisterUserRequest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Domains\Auth\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class RegisterUserRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        return [
+            'nombre_apellido' => ['required', 'string', 'max:255'],
+            'email' => ['required', 'string', 'email', 'max:255', Rule::unique('users', 'email')],
+            'password' => ['required', 'string', 'confirmed'],
+        ];
+    }
+}