Let NPCs roam as HandleNPCStep does

- Random walks and spins from SpriteMovementData, with random sleeps.
- CanObjectMoveInDirection: side walls, land, objects' current and
  previous tiles, the radius (stored plus one) and the screen edge.
- Objects freeze while text is open and during applymovement, and
  return home when both they and their home leave the object window.
- Wandering positions are not saved; test helpers replan around NPCs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/game/rom/profile.ts

@@ -52,6 +52,7 @@ export const SYMBOLS = {
   fruitTreeScript: 0x44000,
   fruitTreeItems: 0x44097,
   engineFlags: 0x80462,
+  spriteMovementData: 0x4273,
   marts: 0x160a9,
   martWelcomeText: 0x15f83,
   martAskMoreText: 0x15fb9,
@@ -256,6 +257,7 @@ export const NUM_POKEMON = 251;
 export const NUM_ITEMS = 190;
 export const NUM_ENGINE_FLAGS = 162;
 export const NUM_FRUIT_TREES = 30;
+export const NUM_SPRITEMOVEDATA = 37;
 /** The last group has no following pointer to bound it. */
 export const LAST_MAP_GROUP_SIZE = 11;