feat: client-discord stop implementation / agent improvements

[odilitime]

Risks

Low

Background

What does this PR do?

implements discord websocket disconnect make character settings optional implement runtime.clients as a dict disable client in characters client

What kind of change is this?

Improvements (misc. changes to existing features)

Why are we doing this? Any context or related work?

Preparation for hot reloading

Documentation changes needed?

My changes should not require a change to the project documentation.

[monilpat]

Also addressing linter and then good to go thanks so much!