Phase 0: scaffold three-service backend (api/worker/frontend)

api/ (ElysiaJS+Bun WS gateway skeleton), worker/ (Rust, Redis dirty-chunk
stream consumer behind a swappable RenderBackend trait), frontend/
(ElysiaJS+Pug+Tailwind4+Alpine, one server-rendered page) — all three
verified running locally. docker-compose wires them up with postgres,
redis, minio (rendered tile/mesh object storage), and Caddy as reverse
proxy.

api/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "@mcmapper/api",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "bun run --watch src/index.ts",
+    "start": "bun run src/index.ts"
+  },
+  "dependencies": {
+    "cookie": "^2.0.1",
+    "elysia": "^1.1.0"
+  },
+  "devDependencies": {
+    "bun-types": "latest",
+    "typescript": "^5.5.0"
+  }
+}