Port the introduction's naming and clock screens

A new game now runs NewGame's InitGender and OakSpeech natively before
the bedroom: Boy or Girl, InitClock's hour and minute steppers with
their YES/NO confirmations, Oak's speech with Wooper, and NamePlayer's
preset names or naming field (a blank name takes CHRIS or KRIS). Texts,
menus and time strings come from a new INTRO profile table verified by
check:reference; Oak's and the player's pictures decode from
TrainerPicPointers, ChrisPic/KrisPic and TrainerPalettes.

The chosen time is kept as a minute offset from the device clock, which
time of day, the weekday, NPC hours and the daily reset now read. The
intro runs only when nothing is saved; a save made during it starts it
again. Saves gain intro and clock.minuteOffset, migrated by absence. The
shell's name and character fields are gone. Intentional change: the
steppers start at the device time rather than 10:00.

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

src/app/runtime.ts

@@ -4,6 +4,9 @@ import type { Button } from "../input/types";
 export interface GameRuntime {
   readonly id: string;
   load(rom: Uint8Array, canvas: HTMLCanvasElement): Promise<void>;
+  /** Start a new game in the loaded session, when nothing was saved; the
+   * emulator reference starts its cartridge instead. */
+  newGame?(): void;
   play(): void;
   pause(): void;
   setButton(button: Button, pressed: boolean): void;

src/app/session.ts

@@ -30,6 +30,7 @@ export class GameSession {
       }
       await this.runtime.load(rom.bytes, canvas);
       if (saved) this.runtime.restoreState(saved.state);
+      else this.runtime.newGame?.();
       // Never retain ROM bytes in storage or the session after loading.
       this.rom = { ...rom, bytes: new Uint8Array() };
       this.state = "paused";