feat(celestial-ring): render the full-globe ring from a store

The celestial ring presents its overlay to a store and the scene chrome
renders it in the globe container, handing back the two canvases the
ring paints. The application shell passes the store in so the keyhole
helpers other packages import stay free of Vue. Without its canvases the
ring still tracks whether the globe is framed and turns itself off.

docs/APPLICATION.md

@@ -210,7 +210,8 @@ such as `provider-settings`, and their hosts are removed. Leaving out
 out `scene-chrome` the before/after imagery dividers (the imagery still splits,
 with no line or handle to move it), the status chips, the toast, the ORBIT
 indicator, the FPS readout, the Scene actions panel, the data-pack attribution
-cards, the wind inspection marker and the Space Missions replay vehicle;
+cards, the wind inspection marker, the Space Missions replay vehicle and
+the full-globe celestial ring;
 leaving out `command-dock` the voice control and its pointer reticle; and
 leaving out `context` the Bhote Koshi reconstruction panel. An unknown
 view name is an error. A host that does not initialize Core's locale passes