Deploy Agents to Experience Cloud Sites

1. Builds the agent and the site it runs on. When asked, it also builds supporting demo data and record pages.
2. Deploys the routing flow and a dedicated messaging channel, then activates the channel.
3. Publishes an Embedded Service deployment with guest access.
4. Adds the widget to every site page through a static resource and sets trusted sites.
5. Fixes an "agents not available" message in the widget by correcting guest access.
6. Tests the chat end to end on the published site: the button appears, the agent joins and greets, and the early steps of the conversation work. When an agent action fails in live chat, it diagnoses and fixes the failure.

When the chat channel itself misbehaves, see Diagnose Agentforce Messaging Channel Issues.