Add a contact to another campaign as a Sequence action

When building a sequence, it would be useful to have an Add to Campaign action that automatically enrolls a contact into a different campaign when they reach that step.

Right now, moving a contact from one campaign to another requires manual intervention or workarounds outside the sequence builder. An in-sequence action would let you chain campaigns together and build multi-stage outreach funnels that run automatically, without leaving the flow.

Example use case: A contact completes your initial outreach sequence and you want them automatically added to a nurture campaign without anyone having to do it by hand.