Rename AI Tycoon to Token Empire across entire codebase

Full rebrand: UI display text, package scope (@ai-tycoon/* -> @token-empire/*),
localStorage keys, Docker/CI image paths, database names, and documentation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/game-engine/src/systems/modelSystem.test.ts

@@ -10,7 +10,7 @@ import { processModels } from './modelSystem';
 import {
   POINT_RELEASE_CAPABILITY_GAIN,
   VRAM_REQUIREMENTS_BY_GENERATION,
-} from '@ai-tycoon/shared';
+} from '@token-empire/shared';
 import type { ResearchBonuses } from './researchBonuses';
 
 const rng = createSeededRNG(42);