[MERGED PR] Merges mechanics with engineer

[Ikea]

The challenges section of this pr is me addressing most of the points against that I thought were legitimate and ways that I think these problems could be addressed. The other main concern people had was "Youll just get 8 mechanics who are just now yellow staffies instead of blue ones", however I believe the main reason why mechanics tend to play like blue staffies is due to the fact that the job has basically no aim, and the aim that the engineer job provides should give it a lot of backbone to that aspect and lead to this playstyle for the job becoming less relevant.