Enum value documentations are missing in generated Prisma schema

[trancong12102]

Description and expected behavior
The generated Prisma schema is missing documentation for enum values.

Environment (please complete the following information):

• ZenStack version: 2.0.1
• Prisma version: 5.13.0
• Database type: postgres

Additional context
schema.zmodel

/// UserRole Documentation
enum UserRole {
  /// User role documentation 1
  /// User role documentation 2
  USER
  /// Admin role documentation
  ADMIN
  MODERATOR
}

schema.prisma

/// UserRole Documentation
enum UserRole {
  USER
  ADMIN
  MODERATOR
}