Create gist support for templates

[SpencerCDixon]

Allow users of the CLI to save a URL to a gist that can be used for the templates of any of the components. Make sure to cache the template response so it's not making api requests on every generation.

Write docs on how to properly build a template gist.

[SpencerCDixon]

Closing this in favor of just being opinionated on what the generated files will look like. In future instead of gist support maybe I will add support for adding a different path for to be used for the template