[css-viewport] [css-device-adapt?] Really create a css-viewport spec #7590
Description
In #4766 (comment), we resolved to create a new CSS Viewport spec, to host the meta viewport stuff at least, but it doesn't seem to have happened yet.
Given there's ongoing effort in improving interoperability in this area, and have ICB / visual / layout viewports more precisely defined (see issues in https://github.com/web-platform-tests/interop-2022-viewport etc), it seems like finally doing this (even if it's mostly placeholders / issue references for now) would give us a good place to put the results of that interop effort.
Is there any official resolution / process we'd need to do to get this started?
@bramus has been leading a lot of this investigation, but I'd be happy to co-edit or so if he or some of the other folks in the cc list are not available.
cc: @smfr @dcrousso @dlibby- @skobes @hiikezoe @theres-waldo