Open Route 29 and Cherrygrove City

- Enable Route 29, its Route 46 gate, Cherrygrove City and its buildings.
- Run item balls through FindItemInBallScript and fruit trees through
  FruitTreeScript, with a native daily reset of the daily engine flags.
- Port the Pokémon Center nurse (HealParty with the PP Up clamp,
  CheckPokerus, phone-call checks) and record the whiteout spawn on
  entering a Pokémon Center, as EnterMapWarp does.
- Port standard Poké Marts with keyboard, D-pad and pointer menus.
- Add the recoil battle command (Struggle) and VAR_BOXSPACE.
- Save fruit trees, the daily reset day and the last spawn map; older
  version-3 backups migrate by absence.

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

tests/mart-fixture.ts

@@ -0,0 +1,31 @@
+import { CrystalAssets } from "../src/game/rom/assets";
+import { GameWorld } from "../src/game/world/world";
+
+/** Places the player at the Cherrygrove Mart counter (facing the clerk
+ * behind it at 1,3 through the counter tile at 2,3) so `interact()` talks
+ * to them without walking the overworld from New Bark Town. */
+export function martFixtureWorld(assets: CrystalAssets) {
+  let seed = 1;
+  const world = new GameWorld(
+    assets,
+    () => new Date("2026-09-22T12:00:00"),
+    () => {
+      seed = (seed * 1103515245 + 12345) >>> 0;
+      return (seed >>> 16) & 255;
+    },
+  );
+  const save = world.save();
+  save.map = "26:4";
+  save.x = 3;
+  save.y = 3;
+  save.direction = "left";
+  world.restore(save);
+  // The first idle tick runs the new game's daily reset.
+  world.tick();
+  return world;
+}
+
+/** Talk to the clerk and let the mart's welcome screen present. */
+export function talkToClerk(world: GameWorld) {
+  world.interact();
+}