Add reference related signals to RefCounted

[Saabir14]

This would open up new possibilities while handling resources and similar classes that inherit from RefCounted
eg:
func _process(_delta): if inventory_holder_weak_ref: var holder: Object = inventory_holder_weak_ref.get_ref() if holder and holder.inventory != inventory: inventory = holder.inventory
Can all be linked to a signal instead.

[AThousandShips]

What kind of signals are you suggesting? I don't see any signals in your example

[Saabir14]

I meant like a ref_change signal that is emitted when it increments or decreases. That way, this code doesn't have to run in process and runs inventory = holder.inventory when the signal is emitted.
Something like refCounter.ref_change.connect(...) in ready

[AThousandShips]

That would be very expensive performance wise, and doesn't match any other pattern in the engine. Generally RefCounted shouldn't care about how many users it has, and I don't see how your example needs this