Provide `glab label create --input json-file`
Problem to solve
When creating new groups and/or projects it's not always possible to share label definitions at a parent group level. I want to be able to import a list of labels into a group/project to match an existing project. This would be a big time saver when setting up projects.
Proposal
glab label list --output json generates a json formatted list of the labels. An orthogonal interface to use such a json list of labels as input to populate a new group or project would be very helpful to avoid manually recreating a large collection of labels on a new project.
Further details
It's not always possible to setup projects with a shared group so they can share the same set of labels. Having a method to import labels could allow administrators to establish collections of labels for different use cases and have the ability to import those labels into new projects or groups when they are created. Basing such a list off an existing project would easy this effort.