added useDecryptMessage hook and updated chat messages

src/stores/chat.tsx

@@ -0,0 +1,8 @@
+import { atom } from 'jotai';
+import { atomWithReset } from 'jotai/utils';
+
+export const chatMessagesAtom = atomWithReset([]);
+export const sortedChatMessagesAtom = atom((get) => {
+  const messages = get(chatMessagesAtom);
+  return messages.sort((x: { created_at: number }, y: { created_at: number }) => x.created_at - y.created_at);
+});