restructured the build module

modules/build/include/helpers.hpp

@@ -0,0 +1,56 @@
+/**
+ * @file helpers.hpp
+ * @brief Header file for the build module support functions
+ *
+ * Defines functions and enumerations for the build module which creates
+ * DPM packages according to specification.
+ *
+ * @copyright Copyright (c) 2025 SILO GROUP LLC
+ * @author Chris Punches <chris.punches@silogroup.org>
+ *
+ * Part of the Dark Horse Linux Package Manager (DPM)
+ */
+#pragma once
+
+#include <string>
+#include <cstring>
+#include <vector>
+#include <getopt.h>
+#include <cstdlib>
+#include <wordexp.h>
+#include <dpmdk/include/CommonModuleAPI.hpp>
+
+/**
+ * @brief Expands environment variables and tildes in a path
+ *
+ * Uses wordexp to handle shell-like expansions in paths,
+ * including environment variables, tildes, and wildcards.
+ *
+ * @param path The path string to expand
+ * @return The expanded path, or the original path if expansion failed
+ */
+std::string expand_path(const std::string& path);
+
+/**
+ * @brief Handler for the help command
+ *
+ * Displays information about available commands in the build module.
+ *
+ * @param argc Number of arguments
+ * @param argv Array of arguments
+ * @return 0 on success, non-zero on failure
+ */
+int cmd_help(int argc, char** argv);
+
+/**
+ * @brief Handler for unknown commands
+ *
+ * Displays an error message for unrecognized commands.
+ *
+ * @param command The unrecognized command string
+ * @param argc Number of arguments
+ * @param argv Array of arguments
+ * @return 1 to indicate failure
+ */
+int cmd_unknown(const char* command, int argc, char** argv);
+