add: markdown search feature

src/utils/markdown-queries.js

@@ -91,3 +91,16 @@ export const useMoveMarkdown = () => {
         }
     );
 };
+
+export const useSearchMarkdown = (keyword) => {
+    const queryClient = useQueryClient();
+    const config = useConfig();
+    return useQuery(["markdownsByKeyword", keyword],
+        () => fetch_(
+            `${config.BACKEND_HOST}/api/markdown/search/${encodeURIComponent(keyword)}`,
+        ),
+        {
+            enabled: !!keyword,
+        }
+    );
+};