### Summary
Extend AiPlayerbot.SummonWhenGroup to apply when bots are auto-added to
a group (e.g., addclass bots or raidus style auto invites).
### Motivation
Bots added automatically to a group never accept a normal invite, so
they do not trigger the summon-on-accept path. When SummonWhenGroup is
enabled, these bots should also be teleported next to the master to
match expected behavior.
### Implementation details
Hook the summon behavior right after automatic group addition.
