Align AoWoW with Sarjuuk/aowow

[Helias]

Aligning this repo with Sarjuuk/aowow means solve a lot of conflicts and be careful about any breaking changes, in particular we have some merge conflicts due to the different trainer SQL structure that AC have compared to TC ( azerothcore/azerothcore-wotlk#6109 ), moreover, in creature now we have id1,id2,id3 as model id instead of just id.

Other differences make very difficult to keep always the aowow source code updated with the main repo sarjuuk/aowow