Add ADRs 0007–0010 for locomotion, focus ring, radial menu, NPC presentation

- 0007: input layers so WASD/look never fire person-verbs; freeze while modal
- 0008: cone focus + billboarded head ring; no type names in the world
- 0009: doughnut action menu (LMB/Space open, click or A/D then Space, Esc/RMB
  cancel); emergency stays on R
- 0010: keep procedural rigs, add face/hair/neck; no Mixamo this pass
Linked from architecture.md, PLAN.md, TODO.md, MEMORY.md.

TODO.md

@@ -2,8 +2,8 @@
 
 ## Player control, focus ring, and radial action menu
 
-Design is in `PLAN.md` → "Player Control, Focus, and Action Menu (next pass)". Distribution
-follow-up (host `REQUIRE_SIGNIN_VIEW`) is deferred.
+Design is in `PLAN.md` → "Player Control, Focus, and Action Menu (next pass)" and ADRs 0007–0010.
+Distribution follow-up (host `REQUIRE_SIGNIN_VIEW`) is deferred.
 
 ### Locomotion