introduction of nuget packages as plugins support

Torch.API/WebAPI/Plugins/IPackageReader.cs

@@ -0,0 +1,12 @@
+#nullable enable
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Torch.API.WebAPI.Plugins;
+
+public interface IPackageReader
+{
+    Task<(IEnumerable<IPackageItem> Root, IReadOnlyDictionary<PackageDependency, IEnumerable<IPackageItem>> Dependencies)> GetItemsAsync();
+}