Svelte example handoff

Ownership

apps/example-svelte hosts shared support, onboarding, protected operations, and cited RAG references selected by query parameter. Domain behavior stays in example-shared. This package owns only Svelte 5 bootstrapping and query routing.

Checks

pnpm --filter @agentskit/chat-example-svelte lint
pnpm --filter @agentskit/chat-example-svelte build