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

frontend/src/App.tsx

@@ -0,0 +1,26 @@
+import React from "react";
+import { Route, Switch } from "react-router-dom";
+import { NavBar } from "./components/NavBar";
+import { useAuth } from "./hooks/use-auth";
+import "./tailwind/generated.css";
+
+export function App() {
+  const { isLoaded } = useAuth();
+
+  console.log("App", { isLoaded });
+
+  if (!isLoaded) {
+    return <div>Loading...</div>;
+  }
+
+  return (
+    <div className="App">
+      <header>
+        <NavBar />
+      </header>
+      <Switch>
+        <Route path="/" exact />
+      </Switch>
+    </div>
+  );
+}