🚀 Migrate to ESLint CLI & Fix All Issues

✅ ESLint CLI Migration:
- Migrated from deprecated 'next lint' to modern 'eslint .'
- Updated package.json script: 'lint': 'eslint .'
- Updated eslint.config.mjs with Next.js ignores
- No more deprecation warnings

✅ Fixed ESLint Errors:
- Added displayName to React components in jest.setup.ts
- Replaced 'any' types with proper TypeScript types
- Fixed require() import in next.config.ts → ES6 import
- Fixed Difficulty enum values (Beginner → BEGINNER, etc.)

✅ Build Status:
- ESLint: 0 errors, 0 warnings ✅
- TypeScript: All type errors resolved ✅
- Build: Successful compilation ✅
- 22 routes generated successfully ✅

🎯 Ready for Next.js 16:
- No deprecated dependencies
- Modern ESLint configuration
- Future-proof codebase

prisma/seed.ts

@@ -282,7 +282,7 @@ Built with a focus on user experience and visual appeal. Implemented proper erro
     await prisma.project.create({
       data: {
         ...project,
-        difficulty: project.difficulty as any,
+        difficulty: project.difficulty as 'BEGINNER' | 'INTERMEDIATE' | 'ADVANCED' | 'EXPERT',
       }
     });
   }