[PROJ] Motion: Migrate proj.org to ReadTheDocs

[Howard Butler]

> On Feb 3, 2023, at 1:00 PM, Howard Butler <howard at hobu.co> wrote:
> 
> All,
> 
> I would like to motion to migrate proj.org from our self-managed GitHub Pages-based deployment to one based on ReadTheDocs (RTD). The new deployment will host multi-versioned content all the way back to 5.0 thanks to Mike Taves. 

Declaring this motion passed with +1s from KurtS, KristianE, EvenR, CharkesK, and AlanS.

RTD Gold membership has moving through the bureaucratic plumbing thanks to Mike Smith, and we should be ready to complete the DNS migration this week or next.

Howard