Add foundation

Toolkit.Foundation/ServiceScopeProvider.cs

@@ -0,0 +1,21 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Toolkit.Foundation;
+
+public class ServiceScopeProvider<TService>(ICache<TService, IServiceScope> cache) :
+    IServiceScopeProvider<TService>
+    where TService : notnull
+{
+    public bool TryGet(TService service, 
+        out IServiceScope? serviceScope)
+    {
+        if (cache.TryGetValue(service, out IServiceScope? value))
+        {
+            serviceScope = value;
+            return true;
+        }
+
+        serviceScope = null;
+        return false;
+    }
+}