It doesn't work atm.
Seems to mostly works (there is few bugs but it's a start) if we replace WOW_PROJECT_CLASSIC by WOW_PROJECT_BURNING_CRUSADE_CLASSIC

I'm releasing a new version now with early support (not much more than what you did tbh). But it's all I can do until I get into a beta of some sort.

This support should be good now. Cheers.