Breed at the Day-Care, hatch Eggs, draw MAIL stationery and browse the Hall of Fame (Closes #29)

- Day-Care and breeding: deposits, withdrawal pricing and growth,
  compatibility, egg species, DVs and moves, DayCareStep, egg
  collection and the Odd Egg, compared with the cartridge's routines.
- CountStep: walking happiness, DoEggStep, DayCareStep and DoBikeStep
  in the original's order; HatchEggs with the ROM's hatch animation,
  compared frame by frame with the original.
- MAIL: all ten stationery types and the Portrait MAIL picture,
  compared with the cartridge's tilemaps, graphics and palettes.
- Printing: Bill's PC boxes, Pokedex PRNT, MAIL and the Photo Studio
  take the original's absent-printer path.
- Hall of Fame records (saved apart from the League flag, ready for the
  League to call) and the Hall of Fame PC, compared with the cartridge's
  _HallOfFamePC on 255 pages.

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

tests/pc.test.ts

@@ -456,6 +456,14 @@ describe.skipIf(!existsSync(romPath))("the Pokémon Center PC", () => {
     until(world);
     pick(world, "FAVS");
     expect(pick(world, "PRINT")).toContain("There's no POKéMON.");
+    pick(world, "BOX2");
+    pick(world, "PRINT");
+    const printer = world.dialogue?.choice;
+    expect(printer?.kind === "screen" && printer.screen.label).toContain("Printer Error 2");
+    world.choose("a");
+    expect(world.dialogue?.choice).toEqual(printer);
+    world.choose("b");
+    until(world);
     close(world);
     expect(world.state.storage.current).toBe(1);
     expect(world.state.storage.names[2]).toBe("FAVS");