feat: list markdown files

frontend/src/App.tsx

@@ -1,16 +1,10 @@
-import { APITester } from "./APITester";
+// import { FilesList } from "./components/FilesList";
+// import { FileContent } from "./components/FileContent";
+import { Root } from "./components/Root";
 import "./index.css";
 
 export function App() {
-  return (
-    <div className="max-w-7xl mx-auto p-8 text-center relative z-10">
-      <div className="flex justify-center items-center gap-8 mb-8">
-      </div>
-
-      <h1 className="text-5xl font-bold my-4 leading-tight">React + Gin</h1>
-      <APITester />
-    </div>
-  );
+  return (<Root/ >);
 }
 
 export default App;