refactor(example): use tsconfig and change entries to ts (#3575)

examples/api/src/main.ts

@@ -0,0 +1,14 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+import 'uno.css'
+import './app.css'
+import App from './App.svelte'
+import { mount } from 'svelte'
+
+const app = mount(App, {
+  target: document.querySelector('#app')!
+})
+
+export default app