Provide a mechanism for adding larps to the queue from the event list/schedule

[dkapell]

Requested a couple of times via discord. This is tricky with multi-bucket events without exposing per-bucket buttons. It also bypasses the need to at least be shown the content warnings before adding the bucket to your queue

[vogon999]

I think if this were implemented we would need to start listing the content warnings as part of the short blurb at the least. Add that to bucket buttons/descriptions and the event list would start getting a lot longer.