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>

src/game/battle/battle.ts

@@ -967,6 +967,8 @@ export class Battle {
         return yield* this.confuseCommand();
       case COMMAND.draintarget:
         return yield* this.drainTarget();
+      case COMMAND.recoil:
+        return yield* this.recoil();
       case COMMAND.checksafeguard:
         return yield* this.checkSafeguard();
       case COMMAND.splash:
@@ -1546,6 +1548,14 @@ export class Battle {
     yield this.hud();
     yield* this.say(BATTLE.SuckedHealthText);
   }
+  /** BattleCommand_Recoil: a quarter of the damage dealt, at least 1 HP. */
+  private *recoil(): Gen {
+    const mon = this.user.mon;
+    mon.hp = Math.max(0, mon.hp - (this.curDamage >> 2 || 1));
+    if (this.turn === 0) this.updateBattleMonInParty();
+    yield this.hud();
+    yield* this.say(BATTLE.RecoilText);
+  }
   private *checkSafeguard(): Gen {
     if (!this.safeguarded()) return;
     this.attackMissed = 1;