feat: show skip offer countdown and transitions

Sources/Core/progress_reporter.hpp

@@ -9,6 +9,7 @@
 #include <string>
 #include <map>
 #include <memory>
+#include <set>
 #include <sys/types.h>
 #include <string_view>
 #include <thread>
@@ -82,6 +83,7 @@ private:
     struct Entry { std::string path; std::unique_ptr<ProgressReporter> reporter; };
     std::unique_ptr<ProgressReporter> single;
     std::map<std::string, Entry> entries;
+    std::set<std::string> paths;
     ProgressReporter *active = nullptr;
     mutable std::mutex mutex;
     std::string failure;