Module management

[H1ghBre4k3r]

In order to provide a good module and package system, we need a way to manage modules.
The first step would be to provide a way to download packages from an external source, e.g., Github. The CLI for that could look like this:

why add h1ghbre4k3r/some-package

This package can then be imported using a new import modifier:

import @mod::h1ghbre4k3r::some-package

To make modules usable transitively, we need a kind of manifest to specify dependencies, which then would be downloaded aswell (e.g., module A requires module B and when we install module A, module B gets downloaded too).