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

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

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using System.Threading.Tasks;
 using StellaOps.Policy;
@@ -44,7 +44,6 @@ public class PolicyValidationCliTests
 
             using var output = new StringWriter();
             using var error = new StringWriter();
-using StellaOps.TestKit;
             var cli = new PolicyValidationCli(output, error);
 
             var exit = await cli.RunAsync(options);