Set 'Default' Internal Agent for 'Skillify'

I think it would be a nice option for those managing the platform; to be able to set a specific internal chat agent in the tenant settings as the ‘default’ agent Neo should utilize when technicians click the “Skillify” button (or “Train”) for a Run from an Agent’s/Workflow’s event history.

This change to that behaviour to default to our own internal chat agent; would allow us to always have access to connected and integrated platforms when doing skillify runs, and create a more “seamless” and smooth transition from UI options to chat.