[MERGED PR] Merges mechanics with engineer

[saccharineChampion]

i don't think crossing your fingers and hoping it turns out well is a good mindset for game design

Normally, no, but the nature of this particular game and of this change make it much more palatable. By the former I mean how easily and quickly small adjustments can be made, the simplicity of reverting a merge, and that the engine isn't a "set up quickly or things will go downhill fast" matter; most maps have solars, and if lights start going out, it's easy to attend to the engine before equipment is affected.