feat(frontend): redo setup with ts+tailwind and implement auth+header

frontend/src/index.tsx

@@ -0,0 +1,16 @@
+import React from "react";
+import ReactDOM from "react-dom";
+import { BrowserRouter } from "react-router-dom";
+import { App } from "./App";
+import { ProvideAuth } from "./hooks/use-auth";
+
+ReactDOM.render(
+  <React.StrictMode>
+    <ProvideAuth>
+      <BrowserRouter>
+        <App />
+      </BrowserRouter>
+    </ProvideAuth>
+  </React.StrictMode>,
+  document.getElementById("root")
+);