Better defaults management, logger class implementation with logging levels, and write to file configuration implementation

include/dpm_interface_helpers.hpp

@@ -1,5 +1,5 @@
 /**
- * @file dpm_interface_helpers.hpp
+* @file dpm_interface_helpers.hpp
  * @brief Helper functions for DPM command-line interface
  *
  * Provides utility functions for command-line argument parsing and
@@ -34,18 +34,17 @@
 #include <iostream>
 #include <getopt.h>
 
+#include "Logger.hpp"
+#include "LoggingLevels.hpp"
+#include "DPMDefaults.hpp"
+
 // data structure for supplied arguments
 struct CommandArgs {
     std::string module_path;
+    std::string config_dir;
     std::string module_name;
-    std::string command;  // All arguments combined into a single command string
+    std::string command;
 };
 
 // parse dpm cli arguments into a serialized structure
 CommandArgs parse_args( int argc, char * argv[] );
-
-// default system paths
-struct DPMDefaultPaths {
-    static const std::string MODULE_PATH;
-    static const std::string CONFIG_DIR;
-};