Restore Stamen Toner map style

If Stamen map tiles moving to Stadia hosting and will no longer be available at old URL 📌 Stamen map tiles moving to Stadia hosting and will no longer be available at old URL Needs review gets merged in as it is now, then this issue would be a duplicate. That merge request also adds Toner back in.

📌 Stamen map tiles moving to Stadia hosting and will no longer be available at old URL Needs review will add all Stamen maps and subsets as a side effect of updating the tile URLs, so closing this page as duplicate.

berramou → closed merge request !1