feat: NPC noir genre table pack + genre registry

Implements Slice 2 Task 1: Noir/Blade Runner genre pack with curated
string tables (names, looks, manners, wants, secrets, voices) and a
registry mapping id->pack for use by offline NPC generator.

Tests: 2/2 pass (noir structure + registry resolution).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/npc/packs/index.js

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+import { noir } from './noir.js';
+
+const packs = new Map([[noir.id, noir]]);
+
+export function getGenrePack(id) { return packs.get(id) || null; }
+export function registerGenrePack(pack) { packs.set(pack.id, pack); }
+export function listGenrePacks() {
+  return [...packs.values()].map((p) => ({ id: p.id, label: p.label }));
+}

src/npc/packs/noir.js

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+export const noir = {
+  id: 'noir',
+  label: 'Noir / Blade Runner',
+  tables: {
+    firstNames: ['Otto', 'Mara', 'Cyrus', 'Dita', 'Lev', 'Priya', 'Sol', 'Neena', 'Bram', 'Vesna'],
+    surnames: ['Brandt', 'Okoye', 'Vance', 'Marlow', 'Sato', 'Kessler', 'Reyes', 'Dahl', 'Cole', 'Nyx'],
+    looks: [
+      'Heavyset, oil-stained cuffs, a rosary they keep touching',
+      'Rail-thin, chrome tooth, coat two sizes too big',
+      'Ex-military posture gone to seed, nicotine-yellow fingers',
+      'Immaculate suit, one cracked lens in their glasses',
+      'Burn scar down one wrist, always half in shadow',
+      'Too-bright dye job, roots showing, tired eyes',
+      'Synthetic-smooth skin that never quite reads as alive',
+      'Missing a fingertip, hides the hand when they notice you looking',
+    ],
+    manners: [
+      'Over-friendly, laughs a beat too late',
+      'Answers questions with questions',
+      'Won\'t sit with their back to the door',
+      'Counts their words like they cost money',
+      'Flatters you, then watches to see if it landed',
+      'Keeps checking a watch that isn\'t there',
+      'Talks fast when lying, slow when it\'s worse',
+    ],
+    wants: [
+      'The debt gone before their shift ends',
+      'A name - someone else to take the fall',
+      'Out of the city on the last transport',
+      'To be believed, just once',
+      'The photograph back before anyone else sees it',
+      'Protection they\'re too proud to ask for',
+    ],
+    secrets: [
+      'Signed off the container they never inspected',
+      'Is already talking to the other side',
+      'The person you\'re looking for is family',
+      'Sold the access codes months ago',
+      'Isn\'t who their papers say they are',
+      'Watched it happen and did nothing',
+    ],
+    voices: [
+      'Says "you understand me?" after everything',
+      'Never finishes the last word of a sentence',
+      'Drops into a second language when rattled',
+      'Calls everyone "friend" like a threat',
+      'Over-enunciates, like reciting',
+      'Laughs at their own lines before they land',
+    ],
+  },
+};

tests/npc/packs.test.js

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+import { describe, it, expect } from 'vitest';
+import { noir } from '../../src/npc/packs/noir.js';
+import { getGenrePack, listGenrePacks } from '../../src/npc/packs/index.js';
+
+const FIELDS = ['firstNames', 'surnames', 'looks', 'manners', 'wants', 'secrets', 'voices'];
+
+describe('noir genre pack', () => {
+  it('has an id, label, and all non-empty tables', () => {
+    expect(noir.id).toBe('noir');
+    expect(noir.label).toMatch(/noir/i);
+    for (const f of FIELDS) {
+      expect(Array.isArray(noir.tables[f]), `${f} is array`).toBe(true);
+      expect(noir.tables[f].length, `${f} non-empty`).toBeGreaterThanOrEqual(6);
+      expect(noir.tables[f].every((x) => typeof x === 'string' && x.length > 0)).toBe(true);
+    }
+  });
+
+  it('is resolvable from the registry', () => {
+    expect(getGenrePack('noir')).toBe(noir);
+    expect(getGenrePack('missing')).toBe(null);
+    expect(listGenrePacks()).toEqual([{ id: 'noir', label: noir.label }]);
+  });
+});