New EEex Feature: Add deferred AfterListsResolved Lua hook

[4Luke4]

This PR implements an alternative listener to the existing EEex_Opcode_AddListsResolvedListener() (which is prone to cause stuttering / slowdowns under certain circumstances).

The new deferred listener fires:

• at most once per sprite ProcessAI() pass
• only if that sprite had one or more ProcessEffectList() resolutions since the previous flush
• never for temporary copied sprites that resolve lists but are destroyed before ProcessAI()
• independently from the legacy immediate listener, which still fires on every raw list resolution

So for one active sprite under normal 30 FPS / 15 AI-pass-per-second behavior: expect about 15 deferred callbacks per second max. For 20 active sprites, the upper bound is about 20 * 15 per second, but only for sprites that actually had pending resolved-list work.

See also: Bubb13/EEex#129.