I am trying to learn how to use monorepos and using a turborepo in my project
all I simply want to do is create a package called db which exports a primsaClient which i can use in my other apps wherever required

here is how the structure looks like

main/
  package.json
  turbo.json
  apps/
    modelapp/
      index.ts //prismaClient is imported in this file
      package.json
  packages/
    db/
      prisma/
      index.ts //prismaClient is exported in this file
      package.json

what I tried

exported primsa like this

import {PrismaClient} from '@prisma/client';
const prismaClient = new PrismaClient();
export default prismaClient

package.json for db looks like this

{
  "name": "@copetech/db",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "exports": {
    ".": {
      "require": "./index.ts",
      "import": "./index.ts"
    }
  },
  "devDependencies": {
    "prisma": "5.18.0"
  },
  "dependencies": {
    "@prisma/client": "5.18.0"
  }
}

package.json for modelapp

{
  "name": "model",
  "version": "1.0.0",
  "main": "src/index.ts",
  "scripts": {
    "build": "tsc",
    "start": "node dist/index.js",
    "dev": "tsc -b && node dist/index.js"
  },
  "dependencies": {
    "@copetech/db": "*",
    "@types/express": "^4.17.21",
    "express": "^4.19.2",
    "mongoose": "^6.0.12"
  }
}

index.ts for model app

import express from "express"
const app = express();
import prismaClient from "@copetech/db";
app.get("/", (req, res) => {
   prismaClient.$connect();
  res.send("Hello World");
});
app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

problems I am facing

1. I want to make sure that packages in db is not built , It should just be there to be imported by any of my apps
2. I am not getting any error while importing primsaClient from “@copetech/db” but I am running into problems while running npm run dev on the root folder
   something like this

(node:27201) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
(Use `node --trace-warnings ...` to show where the warning was created)
/Users/nikhil/Desktop/monorepo/packages/db/index.ts:1
import {PrismaClient} from '@prisma/client';
^^^^^^

SyntaxError: Cannot use import statement outside a module

i tried using npm and yarn both and could not overcome this problem, I am also a beginner in typescript so not sure if im missing something important here