feat: update quick search ui

packages/app/src/components/quick-search/content/searchResult/NotFound.tsx

@@ -0,0 +1,9 @@
+import React from 'react';
+import { Command, useCommandState } from 'cmdk';
+
+const noResult = () => {
+  const search = useCommandState(state => state.search);
+  return <Command.Empty>No results found for "{search}".</Command.Empty>;
+};
+
+export default noResult;

packages/app/src/components/quick-search/content/searchResult/index.tsx

@@ -0,0 +1,21 @@
+import React from 'react';
+import NoResult from './NotFound';
+import { Command } from 'cmdk';
+import Store from '@blocksuite/store';
+
+const SearchResult = () => {
+  return (
+    <>
+      <NoResult />
+      <Command.Group heading="Letters">
+        <Command.Item>a</Command.Item>
+        <Command.Item>b</Command.Item>
+        <Command.Separator />
+        <Command.Item>c</Command.Item>
+      </Command.Group>
+      <Command.Item>Apple</Command.Item>
+    </>
+  );
+};
+
+export default SearchResult;