ChatLine 컴포넌트 추가

+import React from 'react';
+import { ChatData } from './types';
+
+interface ChatLineProps {
+  chatData: ChatData;
+}
+
+export const ChatLine: React.FC<ChatLineProps> = ({ chatData }) => {
+  return (
+    <div className='w-5/6 px-3 py-2 bg-white
+    text-gray-700 text-sm'>{chatData.sender} : {chatData.message}</div>
+  );
+}