Lots of SzGui work

SzGui/SzDatabaseHandler.cs

@@ -0,0 +1,19 @@
+using SzCore;
+using SzCore.DataObjects;
+
+namespace SzGui;
+
+public class SzDatabaseHandler : ISzDatabaseHandler
+{
+    public bool InternetAllowed { get; set; }
+    public Dictionary<string, string> SzDbUrls { get; set; }
+    public Task<SzDataset?> TryRetrieveDatasetAsync(Guid uuid, CancellationToken ct = default)
+    {
+        return null;
+    }
+
+    public Task<ISzTemplate?> TryRetrieveTemplateAsync(Guid uuid, CancellationToken ct = default)
+    {
+        return null;
+    }
+}