Move jupyter/nb2kg to jupyter_server and archive repo

[kevin-bates]

The jupyter/nb2kg repository houses the NB2KG server extension used to configure a Notebook server to communicate with a Gateway server (running either Jupyter Kernel Gateway or Jupyter Enterprise Gateway). This server extension has been obsolete since its functionality was introduced into the gateway package of Notebook versions >= 6.0 and all Jupyter Server versions.

I would like to propose two changes relative to this repository:

1. Since the two related Gateway projects are already in the Jupyter Server organization, I think it makes sense to also have the nb2kg repository in that same organization and propose it be moved into jupyter_server/nb2kg.
2. Because this repository is essentially obsolete, yet continues to get dependabot alerts that it needs its dependency on notebook to be >= 6.4.12, where it should not be used anyway, I think it best that the repository be archived.

I will hold off on any changes until we've decided if zero, one, or both of these changes should be made.

[blink1073]

I think if we're just going to archive it we should leave it in the jupyter org so it is more discoverable if someone was previously using it.

[kevin-bates]

That makes sense.

[kevin-bates]

Per today's Jupyter Server/Kernels team meeting we felt (within the meeting) that archiving jupyter/nb2kg in-place is probably the best step moving forward (in line with @blink1073's suggestion). I've been asked to poll @jupyter-server/jupyter-server-council regarding the repository's archival. In the meantime, I've commented on an existing issue in the nb2kg repo (which is 2+ years old) indicating the (new) desire to archive the repository.

Polling

Polling is open to all members of the Jupyter Server Council. Anyone is free to comment.

Using the built-in emojis, please indicate approval to archive the nb2kg repository within the jupyter organization using 👍 and its disapproval using 👎. If you'd like to further discuss its future, please feel free to comment separately.

Thank you.

[kevin-bates]

Sorry, this should have been closed with the previous comment.