refactor: move prisma to a package

[lihebi]

Prisma related code is now moved from apps/api/ folder to packages/prisma folder, so that the prisma client can be shared among different servers.

[lihebi]

To use the package in a server app, run pnpm add @codepod/prisma, and use like this:

import prisma from "@codepod/prisma";

prisma.repo.findFirst(...)

[senwang86]

If you need to perform prisma migration

• Attach the api container shell
• run pnpm dlx prisma migrate dev --schema ../../packages/prisma/prisma/schema.prisma

[lihebi]

• run pnpm dlx prisma migrate dev --schema ../../packages/prisma/prisma/schema.prisma

I would do this instead (looks simpler):

cd ../../packages/prisma
pnpm dlx prisma migrate dev