[Feature Request] Strong-typed JSON fields

[ymc9]

Background

Related Pisma issue: prisma/prisma#3219

Proposed Solution

1. Add language-level "type" declaration support (not mapped to database tables) [Feature Request] Support for non-model types #783
2. Enforce schema checking at runtime for the strongly-typed fields through enhanced PrismaClient

[ymc9]

Fixed in 2.8.0