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/server/routers/notion-import.ts

@@ -171,9 +171,10 @@ export const notionImportRouter = router({
           }
 
           // Create project
-          const createdProject = await ctx.prisma.project.create({
+          await ctx.prisma.project.create({
             data: {
-              programId: round.programId,
+              roundId: round.id,
+              status: 'SUBMITTED',
               title: title.trim(),
               teamName: typeof teamName === 'string' ? teamName.trim() : null,
               description: typeof description === 'string' ? description : null,
@@ -186,15 +187,6 @@ export const notionImportRouter = router({
             },
           })
 
-          // Create RoundProject entry
-          await ctx.prisma.roundProject.create({
-            data: {
-              roundId: round.id,
-              projectId: createdProject.id,
-              status: 'SUBMITTED',
-            },
-          })
-
           results.imported++
         } catch (error) {
           results.errors.push({