docs: update README file map to reflect split runtime (closes #169)

README.md

@@ -105,7 +105,16 @@ This game is a **decision simulator** for our actual work.
 ## Files
 
 - `index.html` — Game UI
-- `game.js` — Core engine (tick loop, buildings, projects, events)
+- `js/data.js` — Game data, buildings, projects, upgrades
+- `js/utils.js` — Utility functions and formatters
+- `js/combat.js` — Combat and corruption event logic
+- `js/strategy.js` — Strategy and decision systems
+- `js/sound.js` — Audio engine and sound effects
+- `js/engine.js` — Core engine (tick loop, resource generation, state)
+- `js/render.js` — DOM rendering and UI updates
+- `js/tutorial.js` — New player tutorial flow
+- `js/dismantle.js` — Dismantle/ending mechanics
+- `js/main.js` — Entry point, initialization, game loop
 - `DESIGN.md` — Full design document with narrative arc and mechanics
 - `README.md` — This file