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/dataSystem.ts

@@ -1,4 +1,4 @@
-import type { GameState, DataState } from '@ai-tycoon/shared';
+import type { GameState, DataState } from '@token-empire/shared';
 
 export function processData(state: GameState): DataState {
   const subscribers = state.market.consumerTiers.totalUsers;