Route cloud download reconcile through document open services

src/legacy_document_open_services.h

@@ -3,6 +3,8 @@
 #include "app_core/document_session.h"
 #include "foundation/result.h"
 
+#include <string_view>
+
 class App;
 
 namespace pp::panopainter {
@@ -12,4 +14,9 @@ namespace pp::panopainter {
     pp::app::DocumentOpenPlanAction action,
     const pp::app::DocumentOpenRoute& route);
 
+void execute_legacy_downloaded_project_open(
+    App& app,
+    std::string_view path,
+    std::string_view name);
+
 } // namespace pp::panopainter