Move cli-kit themes logic into the themes package

[jamesmengo]

• This includes moving the existing code into packages/theme, and ensuring that the utilities and functions needed in the app package are served.

• Part of this will also require investigating cli-kit dependancies to ensure that we aren't breaking any existing flows

[jeffreyguenther]

Is there a possibility that the theme package might be made public again?

Moving the theme utilities into packages/theme is the opposite direction I was hoping things would go. The cli-kit is the main package still being published.

CLI plugin developers could really use access to the theme interaction code that's been written. I've been advocating for this for a while and not really seeing a clear path forward.

[jamesmengo]

Hey @jeffreyguenther

Sorry about that - let me follow this up and get back to you.
I recall this conversation and the plans we had made to expose certain functionality programatically.