feat(annotations): render the screen-space annotation board from a store

The screen annotation renderer keeps each mark's SVG parts as attribute
records and presents the board to a store after every rendered frame; a
view teleports it to the page and hands back the callout text and mark
groups the renderer measures. The tracked-entity fade is measured once
the frame is in the document, removed marks fade out before they leave,
and the styles it injected move to annotations.css.

docs/APPLICATION.md

@@ -210,8 +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, the Space Missions replay vehicle and
-the full-globe celestial ring;
+cards, the wind inspection marker, the Space Missions replay vehicle, the
+full-globe celestial ring and the screen-space map annotations;
 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