Implement a generator starting point for igniter-based generator

[lawik]

No description provided.

[lawik]

This makes no sense until nerves is updated to provide the generation of a project along with the various dep igniter install tasks.

What it does do is provide the starting point for that procedure.

I may have gone overboard in stripping this down and removed helpful warnings and checks. I tried just delegating to mix new and think if there are checks that we want to re-introduce we could maybe see if they should be in mix new.

[fhunleth]

I bet that felt good to delete all of that code.