feat: integrate customer service chat functionality and add socket.io-client dependency

- Implemented a customer service chat interface in the application.
- Added socket.io-client for real-time communication.
- Updated language files to include customer service related translations.
- Modified navigation to direct users to the customer service page.
- Enhanced UI elements for better user experience in chat interactions.

language/kr.js

@@ -86,6 +86,7 @@ var kr = {
 
   user: "나의 계정",
   userBalance: "잔액",
+  customerService: "고객 서비스",
   logout: "로그아웃",
   tip: "알림",
   logoutTip: "로그아웃하시겠습니까?",
@@ -174,6 +175,21 @@ var kr = {
   chooseCoin: "통화를 선택하세요",
   flagshipHall: "플래그십 홀",
   liveHall: "라이브홀",
+
+  // 고객 서비스
+  csConnected: "연결됨",
+  csConnecting: "연결 중...",
+  csWelcome: "고객 서비스에 오신 것을 환영합니다",
+  csBusy: "상담원이 바빠요. 잠시만 기다려 주세요...",
+  csInputTip: "질문을 입력해 주세요",
+  csInputPlaceholder: "메시지를 입력하고 보내세요...",
+  csSend: "보내기",
+  csMe: "나",
+  csAgent: "상담원",
+  csSessionEnded: "세션 종료",
+  csAgentServing: "님이 도와드립니다",
+  csAgentJoined: "님이 참여했습니다",
+  csConnectFailed: "연결 실패",
 };
 
 export { kr };