chore: add rollup typescript example to validate definitions

examples/rollup-typescript/src/App.svelte

@@ -0,0 +1,15 @@
+<script lang="ts">
+  import { Button, TooltipDefinition } from "carbon-components-svelte";
+</script>
+
+<Button
+  kind="primary"
+  on:click={() => {
+    console.log('click');
+  }}>
+  Primary button
+</Button>
+
+<TooltipDefinition tooltipText="Tooltip text">
+  Tooltip content
+</TooltipDefinition>

examples/rollup-typescript/src/main.ts

@@ -0,0 +1,5 @@
+import App from "./App.svelte";
+
+const app = new App({ target: document.body });
+
+export default app;