Use C++ iostream in untar, enforce naming convention, remodel threading to use join, reduce lambda usage

src/CommonModel.h

@@ -2,13 +2,13 @@
 #include "Util.h"
 
 #include <vosk_api.h>
-
 extern void free(void*);
 struct CommonModel {
   bool normalMdl;
-  bool thrdUsed{};
+  std::atomic_bool thrdUsed{};
   int index;
   std::thread t;
+  std::function<void()> recognizerMain;
   std::string storepath;
   std::string id;
   std::variant<VoskModel*, VoskSpkModel*> mdl;