feat: 회사 관리 API 연동 구현

- CompanyService 및 RemoteDataSource 구현
- Company, Branch DTO 모델 생성 (Freezed)
- 의존성 주입 컨테이너 업데이트
- 회사 등록/수정 폼에 API 연동 로직 적용
- API 통합 계획 문서 업데이트

lib/data/models/company/company_dto.g.dart

@@ -0,0 +1,118 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'company_dto.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$CreateCompanyRequestImpl _$$CreateCompanyRequestImplFromJson(
+        Map<String, dynamic> json) =>
+    _$CreateCompanyRequestImpl(
+      name: json['name'] as String,
+      address: json['address'] as String,
+      contactName: json['contact_name'] as String,
+      contactPosition: json['contact_position'] as String,
+      contactPhone: json['contact_phone'] as String,
+      contactEmail: json['contact_email'] as String,
+      companyTypes: (json['company_types'] as List<dynamic>?)
+              ?.map((e) => e as String)
+              .toList() ??
+          const [],
+      remark: json['remark'] as String?,
+    );
+
+Map<String, dynamic> _$$CreateCompanyRequestImplToJson(
+        _$CreateCompanyRequestImpl instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'address': instance.address,
+      'contact_name': instance.contactName,
+      'contact_position': instance.contactPosition,
+      'contact_phone': instance.contactPhone,
+      'contact_email': instance.contactEmail,
+      'company_types': instance.companyTypes,
+      'remark': instance.remark,
+    };
+
+_$UpdateCompanyRequestImpl _$$UpdateCompanyRequestImplFromJson(
+        Map<String, dynamic> json) =>
+    _$UpdateCompanyRequestImpl(
+      name: json['name'] as String?,
+      address: json['address'] as String?,
+      contactName: json['contact_name'] as String?,
+      contactPosition: json['contact_position'] as String?,
+      contactPhone: json['contact_phone'] as String?,
+      contactEmail: json['contact_email'] as String?,
+      companyTypes: (json['company_types'] as List<dynamic>?)
+          ?.map((e) => e as String)
+          .toList(),
+      remark: json['remark'] as String?,
+      isActive: json['is_active'] as bool?,
+    );
+
+Map<String, dynamic> _$$UpdateCompanyRequestImplToJson(
+        _$UpdateCompanyRequestImpl instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'address': instance.address,
+      'contact_name': instance.contactName,
+      'contact_position': instance.contactPosition,
+      'contact_phone': instance.contactPhone,
+      'contact_email': instance.contactEmail,
+      'company_types': instance.companyTypes,
+      'remark': instance.remark,
+      'is_active': instance.isActive,
+    };
+
+_$CompanyResponseImpl _$$CompanyResponseImplFromJson(
+        Map<String, dynamic> json) =>
+    _$CompanyResponseImpl(
+      id: (json['id'] as num).toInt(),
+      name: json['name'] as String,
+      address: json['address'] as String,
+      contactName: json['contact_name'] as String,
+      contactPosition: json['contact_position'] as String,
+      contactPhone: json['contact_phone'] as String,
+      contactEmail: json['contact_email'] as String,
+      companyTypes: (json['company_types'] as List<dynamic>?)
+              ?.map((e) => e as String)
+              .toList() ??
+          const [],
+      remark: json['remark'] as String?,
+      isActive: json['is_active'] as bool,
+      createdAt: DateTime.parse(json['created_at'] as String),
+      updatedAt: DateTime.parse(json['updated_at'] as String),
+      addressId: (json['address_id'] as num?)?.toInt(),
+    );
+
+Map<String, dynamic> _$$CompanyResponseImplToJson(
+        _$CompanyResponseImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'name': instance.name,
+      'address': instance.address,
+      'contact_name': instance.contactName,
+      'contact_position': instance.contactPosition,
+      'contact_phone': instance.contactPhone,
+      'contact_email': instance.contactEmail,
+      'company_types': instance.companyTypes,
+      'remark': instance.remark,
+      'is_active': instance.isActive,
+      'created_at': instance.createdAt.toIso8601String(),
+      'updated_at': instance.updatedAt.toIso8601String(),
+      'address_id': instance.addressId,
+    };
+
+_$CompanyNameDtoImpl _$$CompanyNameDtoImplFromJson(Map<String, dynamic> json) =>
+    _$CompanyNameDtoImpl(
+      id: (json['id'] as num).toInt(),
+      name: json['name'] as String,
+    );
+
+Map<String, dynamic> _$$CompanyNameDtoImplToJson(
+        _$CompanyNameDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'name': instance.name,
+    };