[BCNM] Add final Waking the Beast BCNM fight (Carbuncle Prime)

[TracentEden2]

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• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Note this is still a draft (to get feedback) as a few details are still being verified on retail. (This includes verification of the potency formula of Healing Ruby II (when used by carbuncle mobs) and the distance range of avatar 2hrs) And also better to wait for the other WTB PRs to be merged.

This PR is part of a series to add the full Waking the Beast quest. This PR adds the final Carbuncle Prime BCNM in Full Moon Fountain. This is a complex fight consists of 7 different stages. The logic is mostly concentrated in the battlefield script in onBattlefieldTick (and private helper functions) as coordination is needed to, for example, spawn and despawn multiple mob groups (during phase changes) and facilitate mobs using simultaneous 2hrs. This centralized logic is better than having the logic distributed across many mob scripts which would add complexity and reduce understandability.

The fight logic and flow is based on many captures including by Siknoz (here and here), Aether (here), and KnowOne (here).

Also the PR includes one small core change: adding a setSpawnAnimation function so that the elemental avatars can be spawned with their special spawn animations (as on retail).

Steps to test these changes

Fight the BCNM and compare to retail captures