Add Prisma Client Python

[RobertCraigie]

https://github.com/RobertCraigie/prisma-client-py

These benchmarks would probably be very similar to the existing Prisma benchmarks but it would be helpful for me to see how it compares to other Python ORMs.

I'd be happy to implement this myself, just wanted to open an issue beforehand :)

[1st1]

Feel free to contribute a PR :)

[colinhacks]

Would love to see to this!