Add SHAddToRecentDocs when running a script file

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: levinli303

CelestiaWinUI/MainWindow.xaml.cpp

@@ -989,6 +989,7 @@ namespace winrt::CelestiaWinUI::implementation
                         if (strong_this == nullptr) return;
                         strong_this->appCore.RunScript(scriptFile.Path());
                     });
+                SHAddToRecentDocs(SHARD_PATHW, scriptFile.Path().c_str());
             }
             co_return;
         }