Can't default built-in default teams or default agents

Not being able to delete built-in / default teams and default agents is a deal-breaker for me.

I want to be able to write my own hermes agents to run in Buzz and not be forced to use defaults which don't serve my end-goal and which populates my agent panel and set-up with stale / old / un-useful information.

Start by locating where Buzz defines and loads built-in or default teams and agents, then trace how they populate the agent panel and setup flow. Done should mean users can remove or avoid unwanted defaults while still creating and running their own Hermes agents.

Written by the indexing model from the issue text.