Fix build and code structure improvements. New but essential UI functionality. CI improvements. Documentation improvements. AI module improvements.

src/Policy/__Tests/StellaOps.Policy.Tests/PolicyBinderTests.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using System.Linq;
 using System.Threading;
@@ -141,7 +141,6 @@ public sealed class PolicyBinderTests
         {
             using var output = new StringWriter();
             using var error = new StringWriter();
-using StellaOps.TestKit;
             var cli = new PolicyValidationCli(output, error);
             var options = new PolicyValidationCliOptions
             {