- Create User entity with gamification fields (Level, Streak, Points)
- Add User DbSet to AppDbContext with proper configuration
- Create initial database migration with Users and Lessons tables
- Add SeedData extension for initial admin user and sample lessons
- Update Program.cs to use seed data method
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
