Remove dynamic form builder and complete RoundProject→roundId migration

Major cleanup and schema migration:
- Remove unused dynamic form builder system (ApplicationForm, ApplicationFormField, etc.)
- Complete migration from RoundProject junction table to direct Project.roundId
- Add sortOrder and entryNotificationType fields to Round model
- Add country field to User model for mentor matching
- Enhance onboarding with profile photo and country selection steps
- Fix all TypeScript errors related to roundProjects references
- Remove unused libraries (@radix-ui/react-toast, embla-carousel-react, vaul)

Files removed:
- admin/forms/* pages and related components
- admin/onboarding/* pages
- applicationForm.ts and onboarding.ts routers
- Dynamic form builder Prisma models and enums

Schema changes:
- Removed ApplicationForm, ApplicationFormField, OnboardingStep, ApplicationFormSubmission, SubmissionFile models
- Removed FormFieldType and SpecialFieldType enums
- Added Round.sortOrder, Round.entryNotificationType
- Added User.country

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(admin)/admin/programs/[id]/page.tsx

@@ -130,7 +130,7 @@ export default async function ProgramDetailPage({ params }: ProgramDetailPagePro
                         {round.status}
                       </Badge>
                     </TableCell>
-                    <TableCell>{round._count.roundProjects}</TableCell>
+                    <TableCell>{round._count.projects}</TableCell>
                     <TableCell>{round._count.assignments}</TableCell>
                     <TableCell>{formatDateOnly(round.createdAt)}</TableCell>
                   </TableRow>