WIP setting up new data project structure and event handlers

BrightGlimmer.Data/Interfaces/IUnitOfWork.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace BrightGlimmer.Data.Interfaces
+{
+    public interface IUnitOfWork 
+    {
+        Task<int> SaveChangesAsync(CancellationToken cancellationToken = default);
+    }
+}