Port evolution, Rare Candy, evolution stones and vitamins

Pokémon that levelled up evolve after a won battle, following
EvolveAfterBattle's checks over the ROM's evolution bytes, with the
evolution screen that B can stop and move learning outside battle. The pack
uses Rare Candy, stones (with ABLE/NOT ABLE labels) and vitamins, and its
pocket tabs now sit in their own row.

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

tests/foundation-fixture.ts

@@ -4,10 +4,11 @@ import { OW } from "../src/game/world/constants";
 import { generatePartyMon } from "../src/game/party/pokemon";
 
 /** `room` places the player at the bedroom PC or poster, "center" at
- * Cherrygrove's Pokémon Center PC with two Pokémon; otherwise outdoors. */
+ * Cherrygrove's Pokémon Center PC with two Pokémon ("candy": the first at
+ * level 13, with a Rare Candy); otherwise outdoors. */
 export function foundationFixture(
   assets: CrystalAssets,
-  room: boolean | "poster" | "center",
+  room: boolean | "poster" | "center" | "candy",
 ) {
   const world = new GameWorld(
     assets,
@@ -16,11 +17,11 @@ export function foundationFixture(
   );
   world.state.scenes["24:4"] = 1;
   world.state.bag.keyItems.push(OW.BICYCLE);
-  if (room === "center") {
+  if (room === "center" || room === "candy") {
     world.state.party = [155, 16].map((species, i) =>
       generatePartyMon(assets.pokemon, {
         species,
-        level: 8 - i * 4,
+        level: room === "candy" && !i ? 13 : 8 - i * 4,
         item: 0,
         otId: world.playerId,
         ot: "CHRIS",
@@ -29,10 +30,11 @@ export function foundationFixture(
       }),
     );
     world.state.bag.items = [{ item: 18, quantity: 5 }]; // POTION
+    if (room === "candy") world.state.bag.items.push({ item: 0x20, quantity: 1 });
   }
   const save = world.save();
   const [map, x, y] =
-    room === "center"
+    room === "center" || room === "candy"
       ? ["26:5", 9, 2]
       : room === "poster"
         ? ["24:7", 6, 1]