Add native Crystal exploration port and reference tooling

src/game/rom/profile.ts

@@ -0,0 +1,30 @@
+/** Addresses only, from PRET 7a7881d0d62e0ddbd82dcf10e7116807487ac651.
+ * RGBDS 1.0.3 crystal11 build was byte-identical to the user-supplied ROM.
+ * No original graphics, maps, dialogue, music or ROM instructions live here.
+ * See docs/NATIVE_PORT.md for source references and verification procedure. */
+export const SYMBOLS = {
+  mapGroups: 0x94000,
+  tilesets: 0x4d596,
+  collisions: 0x4ce1f,
+  environmentColors: 0xb279,
+  backgroundPalettes: 0xb319,
+  objectPalettes: 0xb469,
+  roofPalettes: 0xb569,
+  roofTypes: 0x1c021,
+  roofs: 0x1c03c,
+  housePalettes: 0x495ee,
+  sprites: 0x14736,
+  facings: 0x4049,
+  standardScripts: 0xbc000,
+} as const;
+
+/** The currently ported area. Story callbacks are not executed yet. */
+export const NATIVE_MAPS: Record<string, string> = {
+  "24:4": "New Bark Town",
+  "24:5": "Elm’s lab",
+  "24:6": "Your home",
+  "24:7": "Your room",
+  "24:8": "Neighbor’s house",
+  "24:9": "Elm’s house",
+};
+export const INITIAL_POSITION = { map: "24:7", x: 3, y: 3 } as const;