Add new language strings and update UI in chat screens for "Creating Suggestions" and "Re-Roll Auto Suggestions".

src/lang/en.ts

@@ -290,4 +290,5 @@ export const languageEnglish = {
     simple:"Simple",
     advanced: "Advanced",
     askReRollAutoSuggestions: "Re-Roll Auto Suggestions",
+    creatingSuggestions: "Creating Suggestions...",
 }

src/lang/ko.ts

@@ -265,4 +265,5 @@ export const languageKorean = {
     sendWithEnter: "엔터키로 메세지 보내기",
     clickToEdit: "클릭해서 수정하기",
     askReRollAutoSuggestions: "자동 제안 다시 뽑기",
+    creatingSuggestions: "응답 제안 작성 중...",
 }