Create models and Clean Arch boilerplate

CSR.Application/Interfaces/IUserRepository.cs

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+namespace CSR.Application.Interfaces;
+
+using CSR.Domain.Entities;
+
+public interface IUserRepository
+{
+  Task<User?> GetByIdAsync(int id);
+  // Task<User?> GetByEmailAsync(string email);
+  // Task<User?> GetByUsernameAsync(string username);
+  // Task<IEnumerable<User>> GetAllAsync();
+  Task AddAsync(User user);
+  Task UpdateAsync(User user);
+  Task DeleteAsync(int id);
+}