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>

scripts/check-reference.mjs

@@ -201,8 +201,8 @@ for (const [key, symbol] of Object.entries(ramNames)) {
   if (!match || Number(match[1]) !== ram.get(symbol))
     throw new Error(`Profile RAM mismatch: ${key} / ${symbol}`);
 }
-// BATTLE, OVERWORLD and PC entries are keyed by their PRET labels.
-for (const table of ["BATTLE", "OVERWORLD", "PC"]) {
+// BATTLE, OVERWORLD, PC and INTRO entries are keyed by their PRET labels.
+for (const table of ["BATTLE", "OVERWORLD", "PC", "INTRO"]) {
   const block = new RegExp(`export const ${table} = \\{([\\s\\S]*?)\\} as const;`).exec(profile)?.[1];
   if (!block) throw new Error(`${table} symbol table is missing.`);
   for (const [, quoted, bare, literal] of block.matchAll(/^\s+(?:"([^"]+)"|(\w+)):\s*(0x[0-9a-f]+),/gm)) {