[ci skip] Add one-command setup scripts to k8s-portal

- Add /setup/script?os=mac and /setup/script?os=linux endpoints
- Scripts install kubectl, kubelogin, write kubeconfig, update shell rc
- Unprotected ingress for /setup/script (curl-able without auth)
- Fix kubeconfig to include --oidc-extra-scope for email/profile/groups

modules/kubernetes/k8s-portal/files/vite.config.ts

@@ -0,0 +1,6 @@
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [sveltekit()]
+});