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-simulation/src/actions/data.ts

@@ -1,4 +1,4 @@
-import type { GameState, OwnedDataset } from '@ai-tycoon/shared';
+import type { GameState, OwnedDataset } from '@token-empire/shared';
 
 export function purchaseDataset(state: GameState, dataset: OwnedDataset, cost: number): boolean {
   if (state.economy.money < cost) return false;