[WIP] Config generate

[xtfer]

Brings the branch up to date...

• Cleans up templates and reworks to use Twig template inheritance
• Updates node and php versions
• Converts Commands to implements a common interface, mostly to make adding new ones more self-documenting
• Fixes a couple of minor issues, such as some keys not unpacking correctly.

At this point, this works, however I have concerns about the scalability of it, along with our example repositories which go somewhat unmaintained.