Adding files for control board v2.0.1+2+3

[apollokit]

Also, updates to arduino shield, and updates to pcb assembly READMEs

[apollokit]

This replaces the older draft PR here: #198

[Achllle]

Might want to do a rebase, this seems to be re-introducing a bunch of files that were already deleted in the target branch

[apollokit]

Might want to do a rebase, this seems to be re-introducing a bunch of files that were already deleted in the target branch

Sure about that? Here's the diff:

Are you saying that the hierarchy of electrical/pcb/control_board and electrical/pcb/arduino_uno_shield is not what we want?

[Achllle]

Is it doable to correct that atrocious sheild typo? 🥲

[apollokit]

Is it doable to correct that atrocious sheild typo? 🥲

oh boy, i hadn't even noticed that. Has that just always been there? I suppose it's fixable...

EDIT: fixed it now

[Achllle]

@apollokit can you remove the old files? I think it's best if they're not part of v2.

[apollokit]

@apollokit can you remove the old files? I think it's best if they're not part of v2.

done

[apollokit]

Merging this now to be done with it