Expose license and publish options

[luxaritas]

Since #142, you can run license-package and package with options to customize behavior around what license should be used and how publishing should be configured, but for all packages that consume them, these settings only rely on the nx.json default values. It would be great to expose these as CLI arguments to consuming generators so that you could customize these settings at those levels.

Note this will also require changing how the default values are handled (we need to merge CLI and default arguments before determining whether to skip or error)