feat: web frontend; middleware; serde (WIP?)

frontend/src/index.tsx

@@ -0,0 +1,10 @@
+/* @refresh reload */
+import { render } from 'solid-js/web';
+import App from './App';
+import './styles/index.css';
+
+const root = document.getElementById('root');
+
+if (!root) throw new Error('Root element not found');
+
+render(() => <App />, root);