Support more than just git and file types

[nerdalytics]

Hi!

The README reads Support more than just git and file types, and make file better. I propose a type of URL.

Not sure how to expose the URL to the consuming code base, but I think URLs like for remote APIs are a dependency that needs to be tracked.

.env file is universal enough across languages, vdm could be generating .env files or if present append the list of URLs specified.

Thoughts?

[ryapric]

Can you elaborate a bit more on what you envision that looking like? I'm not sure I understand, since all Spec.Remote fields are already URLs.