Allow customize either ExpireWeapon can detonate or not if invoker of AE is dead

[NetsuNegi]

.

[github-actions]

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[NetsuNegi]

docs need update

[Rinimabi]

work

when set to false, expire weapon will explose when target been killed

[VirusBoomAE]
Duration=120
Animation=VIRUSATTACH
ExpireWeapon=MindBoom
ExpireWeapon.TriggerOn=expire
ExpireWeapon.InvokerMustAlive=false

when set to true, expire weapon won't explose when target been killed

[VirusBoomAE]
ExpireWeapon.InvokerMustAlive=true