Is your feature request related to a problem? Please describe.

Events in AG2 are key actions emitted from an AG2 workflow, it would be beneficial to be able to hook onto certain events, such as human-input, termination, etc.

Events are emitted as part of the run and run_group_chat methods which return a RunResponse.

See this Notebook for examples of run, run_group_chat (at the end), and iterating through events:
https://docs.ag2.ai/latest/docs/use-cases/notebooks/notebooks/run_and_event_processing/

Events classes can be found here:
https://github.com/ag2ai/ag2/tree/main/autogen/events

Some initial thoughts:

• Extend BaseEvent, the base class for events, with the ability to add hooks that get activated when the event is created.
• When using run you get a RunResponseProtocol, perhaps there could be a way to utilise this or extend it.

CC @Lancetnik

Note: Additional events may need to be added.