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.

PLAN.md

@@ -456,6 +456,8 @@ Desktop is the first target: Windows, Linux, and macOS. Web export is a later op
 
 The prototype already walks and looks in first person, but the control scheme fights itself and targeting is a hairline. This pass replaces that with three things that belong together: solid locomotion, a visible focus on a person, and a round action menu for what to do with them.
 
+Decisions: [ADR-0007](docs/adr/0007-locomotion-and-input-layers.md) locomotion and input layers, [ADR-0008](docs/adr/0008-cone-focus-and-head-ring.md) cone focus and head ring, [ADR-0009](docs/adr/0009-radial-action-menu.md) radial action menu, [ADR-0010](docs/adr/0010-procedural-npc-presentation.md) procedural NPC presentation.
+
 ### What is wrong today
 
 - `W` is walk-forward in the input map and wand-screening in `GameManager._handle_key`. Walking at someone with a wand venue fires the wand.