Wrap FluentAvalonia controls within same named classes allowing us to declare the xmlns namespace in our assembly

Framework/Foundation/Configurations/IWritableJsonConfigurationBuilder.cs

@@ -0,0 +1,12 @@
+namespace Toolkit.Foundation;
+
+public interface IWritableJsonConfigurationBuilder
+{
+    Stream? DefaultFileStream { get; }
+
+    IWritableJsonConfigurationBuilder AddDefaultConfiguration<TConfiguration>(string Key) where TConfiguration : class;
+
+    IWritableJsonConfigurationBuilder AddDefaultFileStream(Stream stream);
+
+    void Build(string path);
+}