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>

package.json

@@ -50,7 +50,6 @@
     "@radix-ui/react-slot": "^1.1.1",
     "@radix-ui/react-switch": "^1.1.2",
     "@radix-ui/react-tabs": "^1.1.2",
-    "@radix-ui/react-toast": "^1.2.4",
     "@radix-ui/react-tooltip": "^1.1.6",
     "@tailwindcss/postcss": "^4.1.18",
     "@tanstack/react-query": "^5.62.0",
@@ -63,7 +62,6 @@
     "clsx": "^2.1.1",
     "cmdk": "^1.0.4",
     "date-fns": "^4.1.0",
-    "embla-carousel-react": "^8.5.1",
     "leaflet": "^1.9.4",
     "lucide-react": "^0.563.0",
     "minio": "^8.0.2",
@@ -86,7 +84,6 @@
     "tailwind-merge": "^3.4.0",
     "twilio": "^5.4.0",
     "use-debounce": "^10.0.4",
-    "vaul": "^1.1.2",
     "zod": "^3.24.1"
   },
   "devDependencies": {