[FE] Feat #133: 댓글 text에 해당하는 전역 state 추가

Change-Id: Idd1f8130288230a570eb1afc86b75db97e3f5673

frontend/src/store/detailStore.tsx

@@ -0,0 +1,16 @@
+import { create } from 'zustand'
+import { devtools } from 'zustand/middleware'
+
+interface ICommentStore {
+	commentText: string
+	setCommentText: (commentText: string) => void
+	resetCommentText: () => void
+}
+
+export const useCommentStore = create<ICommentStore>()(
+	devtools((set) => ({
+		commentText: '',
+		setCommentText: (commentText: string) => set(() => ({ commentText: commentText })),
+		resetCommentText: () => set(() => ({ commentText: '' })),
+	}))
+)