Add prisma-erd-generator (Entity Relationship Diagram)

[omar2205]

Describe the problem

I was looking at Prisma's different generators and saw https://github.com/keonik/prisma-erd-generator

Describe the proposed solution

add

generator erd {
  provider = "prisma-erd-generator"
}

And it will generate ./prisma/ERD.svg file

Have you checked if this issue has already been raised?

• I did not find any similar issues

Code of Conduct

• I agree to follow this project's Code of Conduct

[w3cj]

👍 This looks like a good one. We can add the diagram to the contributing guide as well.