Decouple packages

[andrewshawcare]

Each package should be in it's own folder so it can handle custom configuration or lifecycle events (before, after). All packages being in the same folder smells of inheritance over delegation with all of the issues that come with it. A utility library can be created for common operations (install with brew, etc.) but the packages themselves should be completely independent from this library so they don't need to be installed with it if it isn't required.