fix: kakao api test 환경에선 돌아가지 않도록 설정

client/src/components/KakaoInitializer/KakaoInitializer.tsx

@@ -2,7 +2,7 @@ import {useEffect} from 'react';
 
 const KakaoInitializer = ({children}: React.PropsWithChildren) => {
   useEffect(() => {
-    if (!window.Kakao.isInitialized()) {
+    if (!window.Kakao.isInitialized() && process.env.NODE_ENV !== 'test') {
       window.Kakao.init(process.env.KAKAO_JAVASCRIPT_KEY);
     }
   }, []);