refactor(miniapp): add rewrite foundation and demo fixtures

apps/miniapp/src/index.tsx

@@ -1,6 +1,8 @@
 /* @refresh reload */
+import { QueryClientProvider } from '@tanstack/solid-query'
 import { render } from 'solid-js/web'
 
+import { miniAppQueryClient } from './app/query-client'
 import './index.css'
 import App from './App'
 
@@ -10,4 +12,11 @@ if (!root) {
   throw new Error('Root element not found')
 }
 
-render(() => <App />, root)
+render(
+  () => (
+    <QueryClientProvider client={miniAppQueryClient}>
+      <App />
+    </QueryClientProvider>
+  ),
+  root
+)