fix(@schematics/angular): remove 'none' from aiConfig when other tools are selected

Fixes an issue where selecting both None and another AI tool during ng new caused schematic validation to fail. The fix ensures that None is treated as mutually exclusive and is automatically removed when other tools are selected.

Author: suhasrk

packages/schematics/angular/ng-new/index.ts

@@ -60,6 +60,10 @@ export default function (options: NgNewOptions): Rule {
     zoneless: options.zoneless,
   };
 
+  if (options.aiConfig?.includes('none') && options.aiConfig.length > 1) {
+    options.aiConfig = options.aiConfig.filter(t => t !== 'none');
+  }
+
   return chain([
     mergeWith(
       apply(empty(), [