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.

apps/api/src/index.ts

@@ -0,0 +1,35 @@
+import { serve } from "@hono/node-server";
+import { Hono } from "hono";
+import { cors } from "hono/cors";
+import { logger } from "hono/logger";
+import { authRouter } from "./routes/auth.js";
+import { bossRouter } from "./routes/boss.js";
+import { gameRouter } from "./routes/game.js";
+import { prestigeRouter } from "./routes/prestige.js";
+import { profileRouter } from "./routes/profile.js";
+
+const app = new Hono();
+
+app.use("*", logger());
+app.use(
+  "*",
+  cors({
+    origin: process.env["CORS_ORIGIN"] ?? "http://localhost:5173",
+    allowHeaders: ["Authorization", "Content-Type"],
+    allowMethods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
+  }),
+);
+
+app.route("/auth", authRouter);
+app.route("/game", gameRouter);
+app.route("/boss", bossRouter);
+app.route("/prestige", prestigeRouter);
+app.route("/profile", profileRouter);
+
+app.get("/health", (context) => context.json({ status: "ok" }));
+
+const port = Number(process.env["PORT"] ?? 3001);
+
+serve({ fetch: app.fetch, port }, () => {
+  console.log(`Elysium API running on port ${port}`);
+});