Be able to create unitypackages out of selected folders

[CQVan]

Context

I'm creating a node dialog editor that people download as a Unity package.

Suggested solution

Unity-actions could gain the function to create a Unity package out of specified folders.

Considered alternatives

Doing it yourself

• slows down workflow a bit, especially on larger packages.

Additional details

no additional details

[davidmfinol]

Looks like a duplicate of https://github.com/game-ci/unity-builder/issues/236 and https://github.com/game-ci/unity-builder/issues/363