Initial commit: HelpDesk ICHN - .NET 10 backend + Next.js 16 frontend

backend/HelpDesk.Data/Repositories/IRepository.cs

@@ -0,0 +1,11 @@
+namespace HelpDesk.Data.Repositories;
+
+public interface IRepository<T> where T : class
+{
+    Task<T?> GetByIdAsync(Guid id);
+    Task<IEnumerable<T>> GetAllAsync();
+    Task<T> AddAsync(T entity);
+    Task UpdateAsync(T entity);
+    Task DeleteAsync(T entity);
+    Task<int> SaveChangesAsync();
+}