Request to move all repos from jupyter-incubator into jupyter

[Carreau]

This mirrors jupyter-governance/ec-team-compass#51,

There are 4 repos in juyter incubator:

• Spark magic (last activity 6 month ago), move to jupyter as is
• proposals, contentmanagement, declarativewidgets_explorer (last activity 4+ years ago, and archived) move to Jupyter as well.

Then archive the org and kick everybody out.

This is in order to start reducing the number of orgs, as managing many orgs is a hassle for many reasons: managing security reports, managing teams, GitHub sponsors, blocking users org wide ... etc.

[jtpio]

cc @jupyter/software-steering-council for awareness

[Carreau]

SSC should have met yesterday and on sept 23rd, is there any update @jupyter/software-steering-council ?