[finalization] dev container feature distribution specification

[joshspicer]

A forum to discuss the dev container feature distribution specification.

A continuation of the discussion found here: #7

[guiyomh]

Whaou! I love ❤️ this new file organization. I was able to create and test my own features quickly.
Good work 👍

[Chuxel]

Features are now available broadly and in use so closing this issue out. Feel free to raise additional proposals in this repository.

[muruku1]

Once again me you guys 😀

[8Viktor-1]

A forum to discuss the dev container feature distribution specification.

A continuation of the discussion found here: #7