Implement checks for equipment files.

[ghost]

Is your feature request related to a problem? Please describe. There is absolutely nothing on server launch/post-launch to tell you that an equipment file is wrongly configured, other than going into a game and watching the error spam in console. I should've gotten a warn at least that certain commas were missing when adding map_mines to equipment files yesterday; I did not and, thanks to that, I only knew that map_nt was broken too as a result because I joined a game just in case.

Describe the solution you'd like Title.

Describe alternatives you've considered No.

Additional context

BlameTahmid

[tachibanayui]

rip

[Steanky]

I will low-priority this, simply because it's something that we will end up doing regardless post-release once we restructure arenas.