Changed Shop interface to be more asynchronous.

Implemented changes in Props.

Implemented said changes in AdafruitShop.

Fixed and improved caching in AdafruitShop.

Props-Modules/Props.Shop/Framework/IShop.cs

@@ -7,7 +7,7 @@ using Microsoft.Extensions.Logging;
 
 namespace Props.Shop.Framework
 {
-    public interface IShop : IDisposable
+    public interface IShop : IAsyncDisposable
     {
         string ShopName { get; }
         string ShopDescription { get; }
@@ -17,8 +17,7 @@ namespace Props.Shop.Framework
 
         public Task<ProductListing> GetProductFromIdentifier(string identifier);
 
-        void Initialize(string workspaceDir, ILoggerFactory loggerFactory);
-        ValueTask SaveData();
+        ValueTask Initialize(string workspaceDir, ILoggerFactory loggerFactory);
         public SupportedFeatures SupportedFeatures { get; }
     }
 }