refactor: centralize brand, company info, assets and Persian strings

Phase 1 of turning the game into the company landing page.

- Add src/config/company.js with name, tagline, contact, about and the
  product line, plus a brand palette built around #00a693 (contrast
  checked); placeholders are marked TODO(company).
- Add src/config/assets.js listing every loaded file with its expected
  format; placeholders are marked TODO(asset).
- Move all Persian interface text, dialogue, missions and scenery text
  into src/i18n/fa.js; components and game code read from it.
- Expose the palette as CSS variables (--color-primary and shades) and
  Tailwind colours, and use it for 3D materials and map drawings.
- Fix the arrival line that still called the manager's car a white
  pickup.
- Add tests that block hard-coded Persian text and low-contrast colours.

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

tailwind.config.js

@@ -4,7 +4,18 @@ export default {
   content: ['./index.html', './src/**/*.{js,jsx}'],
   theme: {
     extend: {
-      colors: { surface: '#0d1412', hud: 'var(--hud)', gold: 'var(--gold)', teal: 'var(--teal)' },
+      colors: {
+        surface: 'var(--color-surface)',
+        hud: 'var(--hud)',
+        gold: 'var(--gold)',
+        teal: 'var(--teal)',
+        primary: {
+          DEFAULT: 'var(--color-primary)',
+          light: 'var(--color-primary-light)',
+          dark: 'var(--color-primary-dark)',
+          on: 'var(--color-on-primary)',
+        },
+      },
     },
   },
   plugins: [plugin(({ addBase }) => addBase(gameTheme))],