feat(voice): render the pointer reticle beside the voice control

PointerReticle keeps the turn's timers and tool tracking and presents
where the user pointed to the gev-pointer-reticle store, one entry per
reticle; the command dock teleports each to the body with the same
class, aria-hidden, hidden state, target and position. The voice QA
reads the card and reticle after Vue's flush, and the application guide
says leaving out the command dock leaves out the voice control and its
reticle.

docs/APPLICATION.md

@@ -209,7 +209,8 @@ such as `provider-settings`, and their hosts are removed. Leaving out
 `layer-panels` also leaves out the scene sharing dialogs it draws, and leaving
 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 and the ORBIT
-indicator. An unknown
+indicator, and leaving out `command-dock` the voice control and its pointer
+reticle. An unknown
 view name is an error. A host that does not initialize Core's locale passes
 `localePicker: false` to `createApplicationControls` instead of editing the
 markup. Node tests that import application modules register the component