design: build algorithm for kits

[webern]

Issue number:

Related to #198

Description of changes:

Describe a build algorithm that understands the difference between kits and packages and can put the right packages into a kit.

Testing done:

N/A

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.