Добавил слой Application

backend/UniVerse.Application/Interfaces/ILocationService.cs

@@ -0,0 +1,12 @@
+using UniVerse.Application.DTOs.Locations;
+
+namespace UniVerse.Application.Interfaces;
+
+public interface ILocationService
+{
+    Task<List<LocationDto>> GetAllAsync();
+    Task<LocationDto> GetByIdAsync(int id);
+    Task<LocationDto> CreateAsync(CreateLocationRequest request);
+    Task<LocationDto> UpdateAsync(int id, UpdateLocationRequest request);
+    Task DeleteAsync(int id);
+}