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/market/obsolescenceSystem.ts

@@ -1,10 +1,10 @@
-import type { ObsolescenceState, Era } from '@ai-tycoon/shared';
+import type { ObsolescenceState, Era } from '@token-empire/shared';
 import {
   OBSOLESCENCE_BASELINE_GROWTH,
   OBSOLESCENCE_ERA_ACCELERATOR,
   FRESHNESS_DECAY_RATE,
   NEW_MODEL_BOOST_TICKS,
-} from '@ai-tycoon/shared';
+} from '@token-empire/shared';
 
 export function updateObsolescence(
   obs: ObsolescenceState,