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/rounds/[id]/live-voting/page.tsx

@@ -180,7 +180,7 @@ function LiveVotingContent({ roundId }: { roundId: string }) {
       if (storedOrder.length > 0) {
         setProjectOrder(storedOrder)
       } else {
-        setProjectOrder(sessionData.round.roundProjects.map((rp) => rp.project.id))
+        setProjectOrder(sessionData.round.projects.map((p) => p.id))
       }
     }
   }, [sessionData])
@@ -253,7 +253,7 @@ function LiveVotingContent({ roundId }: { roundId: string }) {
     )
   }
 
-  const projects = sessionData.round.roundProjects.map((rp) => rp.project)
+  const projects = sessionData.round.projects
   const sortedProjects = projectOrder
     .map((id) => projects.find((p) => p.id === id))
     .filter((p): p is Project => !!p)