Gather use cases for "reactive" actions

I have the feeling we could do so much more with triage-serverless, like reacting to “commands”, e.g. in https://github.com/rymai/tv.rymai.me/pull/2 you can mention @dependabot with a command. I think we could do the same, e.g. @triage-bot update roulette to update the roulette.

I created this issue to gather the potential use cases for these "reactive actions", or "commands".

Use cases

• @triage-bot ping hello => PoC that would reply with @username hello!.
• @triage-bot run danger => that would be super useful for community contributions since danger-review cannot run for forks.
• @triage-bot label ~"devops::create" ~bug => that would be super useful for community contributors who don't have the permissions to add labels.
• more uses cases (please edit the description directly)