feat: [barobill] 바로빌 연동 관리 API 7개 엔드포인트 구현

- SOAP 기반 BarobillSoapService 생성 (MNG 코드 포팅)
- BarobillMember, BarobillConfig 모델 생성
- BarobillController 7개 메서드 (login, signup, status, URL 조회)
- FormRequest 검증 클래스 3개 생성
- 라우트 등록 (POST /barobill/login, /signup, GET /status 등)
- i18n 메시지 키 추가 (ko/en)
- config/services.php에 barobill 설정 추가

app/Http/Requests/Barobill/BankServiceUrlRequest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Requests\Barobill;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class BankServiceUrlRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'bank_code' => ['required', 'string', 'max:10'],
+            'account_type' => ['required', 'string', 'max:10'],
+        ];
+    }
+}

app/Http/Requests/Barobill/BarobillLoginRequest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Requests\Barobill;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class BarobillLoginRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'barobill_id' => ['required', 'string', 'max:50'],
+            'password' => ['required', 'string', 'max:255'],
+        ];
+    }
+}

app/Http/Requests/Barobill/BarobillSignupRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests\Barobill;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class BarobillSignupRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'business_number' => ['required', 'string', 'max:20'],
+            'company_name' => ['required', 'string', 'max:100'],
+            'ceo_name' => ['required', 'string', 'max:50'],
+            'business_type' => ['nullable', 'string', 'max:50'],
+            'business_category' => ['nullable', 'string', 'max:50'],
+            'address' => ['nullable', 'string', 'max:255'],
+            'barobill_id' => ['required', 'string', 'max:50'],
+            'password' => ['required', 'string', 'max:255'],
+            'manager_name' => ['nullable', 'string', 'max:50'],
+            'manager_phone' => ['nullable', 'string', 'max:20'],
+            'manager_email' => ['nullable', 'email', 'max:100'],
+        ];
+    }
+}