Port the PC and boxes

Read TileCollisionStdScripts from the ROM so the Pokémon Center PC runs
PokemonCenterPC: Bill's PC (deposit, withdraw, release, change and name
boxes), the player's item storage (withdraw, deposit, toss, mail box) and
Oak's Pokédex rating. The house PC now opens the full player's PC menu.

A catch with a full party goes to the current box through SendMonIntoBox;
a full box keeps the ball, and filling it queues Bill's call as a memory
script after the battle. Saves gain boxes, box names and PC items,
migrated by absence.

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

docs/ARCHITECTURE.md

@@ -59,6 +59,11 @@ copy and a revision counter, so rollback and the minimap see the same terrain.
 Surf, Cut and Strength use the ROM scripts. Start/Select opens the Key Items
 menu, pausing overworld ticks while choosing the Bicycle. The bedroom PC edits
 decorations on the script draft and reloads the room when the menu commits.
+`scripts/pc.ts` runs the Pokémon Center and house PCs on the same draft, so a
+refused step leaves boxes and items unchanged. `party/storage.ts` holds the
+boxes and the PC's items. A `memscript` effect queues Bill's call (like
+`LoadMemScript`); the world keeps it in memory only and runs it before scene
+scripts.
 The wall/poster Town Map is a ROM-backed canvas presented by a script effect.
 
 `TilesetAnimator` translates the ROM animation command tables, advancing two