In our recent changes we added the `onStartupFinished` activation event to our extension. This is likely activating our extension before folks are using it. Although it is in the background, we probably want to avoid activating until we need to. That will cause less cpu for users, and avoid slowing things down if they do have a slower comp.

We may want to instead use the `onChatParticipant` activation event and remove
https://code.visualstudio.com/api/references/activation-events#onChatParticipant 

This ticket involves looking into the implications of changing it, and changing it if it's worth it. Is it still quickly responsive in the chat if we use that? We may want to keep the `onStartupFinished` if it does speed up the use of our participant.