improvement(code-structure): move db into separate package (#1364)

* improvement(code-structure): move db into separate package

* make db separate package

* remake bun lock

* update imports to not maintain two separate ones

* fix CI for tests by adding dummy url

* vercel build fix attempt

* update bun lock

* regenerate bun lock

* fix mocks

* remove db commands from apps/sim package json

docker-compose.prod.yml

@@ -62,6 +62,7 @@ services:
 
   migrations:
     image: ghcr.io/simstudioai/migrations:latest
+    working_dir: /app/packages/db
     environment:
       - DATABASE_URL=postgresql://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres}@db:5432/${POSTGRES_DB:-simstudio}
     depends_on: