pmt: fix memory leaks, and improve info function

- Removed --no-write-test argument of memory test function
 - Fixed memory leak of memory test function
 - Improved info function with using nlohmann/json header-only library
 - Some other improvents

srclib/libhelper/src/Classes.cpp

@@ -95,7 +95,7 @@ garbageCollector::~garbageCollector() {
     close(fd);
   for (const auto &fp : _fps)
     fclose(fp);
-  for (const auto &file: _files)
+  for (const auto &file : _files)
     eraseEntry(file);
 }
 
@@ -105,7 +105,7 @@ void garbageCollector::delAfterProgress(char *&_ptr) {
 void garbageCollector::delAfterProgress(uint8_t *&_ptr) {
   _ptrs_u.push_back(_ptr);
 }
-void garbageCollector::delFileAfterProgress(const std::string_view path) {
+void garbageCollector::delFileAfterProgress(const std::string &path) {
   _files.push_back(path);
 }
 void garbageCollector::closeAfterProgress(const int _fd) {