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/tin-tower.test.ts

@@ -84,6 +84,14 @@ describe.skipIf(!existsSync(romPath))("Tin Tower and Whirl Islands with the loca
     world.state.party.pop();
     world.state.party.push(mon(world, ENTEI, { ot: name, otId: world.playerId ^ 1 }));
     expect(beasts()).toEqual([false, true]);
+    // Preserve CheckOwnMonAnywhere's Day-Care omission: our own Entei
+    // in either keeper's care still does not satisfy MonCheck.
+    world.state.party.pop();
+    for (const [slot, flag] of [["mon1", 6], ["mon2", 7]] as const) {
+      world.state.dayCare[slot] = toBoxMon(mon(world, ENTEI, { ot: name }));
+      world.state.flags.add(flag);
+      expect(beasts()).toEqual([false, true]);
+    }
     // Without any party Pokémon, CheckOwnMonAnywhere finds nothing.
     world.state.party = [];
     expect(beasts()).toEqual([true, true]);