Add mini web demo

demo/src/index.tsx

@@ -0,0 +1,11 @@
+import * as React from "react";
+import { createRoot } from "react-dom/client";
+import AppContextProvider from "./components/hooks/context";
+import App from "./App";
+const container = document.getElementById("root");
+const root = createRoot(container!);
+root.render(
+  <AppContextProvider>
+    <App/>
+  </AppContextProvider>
+);