Start to port main gut of the foundation

Toolkit.Foundation/Configurations/ConfigurationInitializer.cs

@@ -0,0 +1,23 @@
+using CommunityToolkit.Mvvm.Messaging;
+
+namespace Toolkit.Foundation
+{
+    public class ConfigurationInitializer<TConfiguration> : IInitializer where TConfiguration : class, new()
+    {
+        private readonly TConfiguration configuration;
+        private readonly IMessenger messenger;
+
+        public ConfigurationInitializer(TConfiguration configuration,
+            IMessenger messenger)
+        {
+            this.configuration = configuration;
+            this.messenger = messenger;
+        }
+
+        public async Task InitializeAsync()
+        {
+            messenger.Send(configuration);
+            await Task.CompletedTask;
+        }
+    }
+}