Marking plugins as "abandoned" or "inactive"

[jni]

Based on napari/napari#6693, I think we should (a) provide npe2 tags to mark a plugin as abandoned/archive/inactive, and (b) have a way to override this on the hub/npe2api side, in case e.g. maintainers become completely unresponsive. This could be done through maintenance of a "patch file" that could override plugin details, much in the same way that conda-forge recipes are able to patch projects before building them.

Obviously, we would have to be very judicious in using this, but I think that any concerns there can be managed (e.g. through an easy appeals process in case a project is inaccurately marked as inactive).

Then the hub would not show inactive plugins, of which there's bound to be quite a few over time.