wrangler deploy --assets flag existing; do we have any actual documentation about how that works? Can it be used to host assets for a worker or is it just for using a worker to only host static assets?@cloudflare/kv-asset-handler as per https://developers.cloudflare.com/workers/configuration/sites/start-from-worker/. Works, boilerplate-y.fetch a relative path. Works, feels kind of silly?--assets flag does? What's this I hear about an ASSETS binding; is that only for pages?