feat: initial elysium idle game prototype

Sets up the full monorepo with pnpm workspaces. Includes shared types
package, Hono API with Discord OAuth/JWT auth, Prisma v6 + MongoDB
Atlas, and React + Vite frontend with game loop, five tabs, and
Discord-linked save/load.

packages/types/eslint.config.js

@@ -0,0 +1,3 @@
+import { nhcarrigan } from "@nhcarrigan/eslint-config";
+
+export default [...(await nhcarrigan())];