New CG repos: Spatial Favicons, Lighting Estimation

Hello, immersive web folks.

I'm pleased to announce that the 3D favicons and lighting estimation
proposals have moved to the next step in the CG process with the creation
of GitHub repos.

Work on those topics will now occur here:
Lighting: https://github.com/immersive-web/lighting-estimation/
Favicons: https://github.com/immersive-web/spatial-favicons/

Ada Rose Cannon has volunteered to manage the creation of an explainer
documentation for lighting.

Rik Cabanier will handle the initial process of putting together guidance
documents for how UAs may handle parsing and rendering the new favicon
types.

Both topics deserve wide consideration beyond Samsung and Magic Leap so
please coordinate with Ada and Rik to give these topics the consideration
that they deserve.

I also had a chance to use the new GitHub feature that allows us to move
Issues between repos! I've moved the originating Issues from the proposals
repo into their respective new repos:
https://github.com/immersive-web/lighting-estimation/issues
https://github.com/immersive-web/spatial-favicons/issues

If you'd like more info about how the CG proposals process works, check out
the new README in the proposals repo.
<https://github.com/immersive-web/proposals/blob/master/README.md>

- Trevor

-- 

*Trevor Flowers* 🌸🌸
trevor@transmutable.com
Principal at Transmutable <https://transmutable.com/>
Friend of the Wider Web <https://potassiumes.org/wider-web/>