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/mail.test.ts

@@ -256,6 +256,32 @@ describe.skipIf(!existsSync(romPath))("MAIL", () => {
     expect(world.state.bag.items).toEqual([{ item: FLOWER_MAIL, quantity: 1 }]);
   });
 
+  it("prints with Start, waits for B on the error and restores the letter", () => {
+    const world = fixture();
+    const mon = world.state.party[0];
+    mon.item = FLOWER_MAIL;
+    mon.mail = letter(world, "“HELLO…”");
+    mailMenu(world);
+    world.choose(0);
+    const before = world.dialogue?.choice;
+    expect(before?.kind).toBe("screen");
+    world.choose("down");
+    expect(world.mailView).toEqual(mon.mail);
+    world.choose("start");
+    const printer = world.dialogue?.choice;
+    expect(printer?.kind === "screen" && printer.screen.label).toContain("Printer Error 2");
+    expect(world.mailView).toBeUndefined();
+    world.choose("a");
+    expect(world.dialogue?.choice).toEqual(printer);
+    world.choose("b");
+    expect(world.mailView).toEqual(mon.mail);
+    expect(world.dialogue?.choice).toEqual(before);
+    world.choose("a");
+    until(world);
+    close(world);
+    expect(world.state.party[0].mail).toEqual(mon.mail);
+  });
+
   it("keeps a Pokémon holding MAIL out of the boxes", () => {
     const world = fixture();
     const mon = world.state.party[1];