Fluid support for ADT tiles

[briochie]

ADT tiles come with their own fluid data to generate meshes that align with the ADT's mesh. The goal would be to use this data to successfully parse this data.

After the last attempt, I believe the fluid data from wow.export may not be parsed correctly, based on inaccurate info from the wow.dev wiki. There is/was a PR for wow.export that claimed to address this. I will potentially test that branch to see if it makes a difference for me locally.