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/(public)/my-submission/[id]/submission-detail-client.tsx

@@ -132,7 +132,7 @@ export function SubmissionDetailClient() {
             </Badge>
           </div>
           <p className="text-muted-foreground">
-            {project.roundProjects?.[0]?.round?.program?.year ? `${project.roundProjects[0].round.program.year} Edition` : ''}{project.roundProjects?.[0]?.round?.name ? ` - ${project.roundProjects[0].round.name}` : ''}
+            {project.round?.program?.year ? `${project.round.program.year} Edition` : ''}{project.round?.name ? ` - ${project.round.name}` : ''}
           </p>
         </div>
       </div>

src/app/(public)/my-submission/my-submission-client.tsx

@@ -132,10 +132,9 @@ export function MySubmissionClient() {
       ) : (
         <div className="space-y-4">
           {submissions.map((project) => {
-            const latestRoundProject = project.roundProjects?.[0]
-            const projectStatus = latestRoundProject?.status ?? 'SUBMITTED'
-            const roundName = latestRoundProject?.round?.name
-            const programYear = latestRoundProject?.round?.program?.year
+            const projectStatus = project.status ?? 'SUBMITTED'
+            const roundName = project.round?.name
+            const programYear = project.round?.program?.year
 
             return (
             <Card key={project.id}>