refactor for better prisma v7 support

[marcjulian]

• refactor to nx repo
• simplify nestjs-prisma library - only contains one PrismaService
• move docs to starlight - describe how to use library or copy code
• add simple example for library or copy code usage

Test version [email protected], docks for the new version are available here next.nestjs-prisma.dev

# npm
npm install [email protected]

# pnpm
pnpm add [email protected]

# yarn
yarn add [email protected]

Breaking changes

• removes schematics and dependencies
• removes docker-compose files
• remove PrismaService with @prisma/client imports - PrismaClient is not generated under @prisma/client with v7+
• replace CustomPrismaService for custom output path with PrismaService
• removes PrismaClientExceptionFilter as it also relied on @prisma/client imports