Add src/App.tsx

src/App.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+import './App.css';
+import Dashboard from './components/Dashboard';
+
+function App() {
+  return (
+    <div className="App">
+      <Dashboard />
+    </div>
+  );
+}
+
+export default App;