chore(svelte-examples): pull out of lib package (#3363)

* chore(svelte-examples): pull out of lib package

* chore(svelte-examples): cleanup

* chore(examples): add readme files

examples/svelte/src/routes/+layout.server.ts

@@ -0,0 +1,8 @@
+import { redirect } from '@sveltejs/kit';
+
+/** @type {import('./$types').LayoutServerLoad} */
+export function load({ route }) {
+  if (route.id === '/') {
+    throw redirect(307, '/overview');
+  }
+}