feat: enhance QuizSchema and related schemas with new fields and relations

- Updated QuizSchema to expose correctAnswer as a field with a resolver, improving data retrieval for quizzes.
- Introduced new object types for correctAnswer, allowing for flexible data structures (StringType and StringListType).
- Modified createQuiz mutation to automatically associate the current user as centerMentorId, enhancing data integrity.
- Added personalMilestone relation to ScheduleSchema, linking schedules to personal milestones for better tracking.
- Included quiz relation in ServiceSchema, establishing a connection between services and their associated quizzes.
- Updated Prisma types to reflect the new relationships and fields, ensuring consistency across the application.

src/Schedule/schedule.schema.ts

@@ -68,6 +68,10 @@ export class ScheduleSchema extends PothosSchema {
           description: 'The managed service the schedule belongs to.',
           nullable: false,
         }),
+        personalMilestone: t.relation('personalMilestone', {
+          description: 'The personal milestone of the schedule.',
+          nullable: true,
+        }),
       }),
     })
   }