add: implementacao inicial

Repositories/IWorkshopRepository.cs

@@ -0,0 +1,12 @@
+
+using CampusWorkshops.Api.Models;
+
+namespace CampusWorkshops.Api.Repositories;
+
+// Define repository contract; implementations should be provided by students during the workshop.
+public interface IWorkshopRepository
+{
+    Task<IReadOnlyList<Workshop>> GetAllAsync(DateTimeOffset? from, DateTimeOffset? to, string? q, CancellationToken ct);
+    Task<Workshop?> GetByIdAsync(Guid id, CancellationToken ct);
+    Task<Workshop> AddAsync(Workshop workshop, CancellationToken ct);
+}