restructure of verify module for better code organizations

modules/verify/include/verification.hpp

@@ -0,0 +1,57 @@
+/**
+* @file verification.hpp
+ * @brief Functions for verifying package integrity and signatures
+ *
+ * Defines functions for verifying checksums and signatures of DPM packages
+ * and package stage directories.
+ *
+ * @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 <filesystem>
+#include <dpmdk/include/CommonModuleAPI.hpp>
+
+/**
+ * @brief Verifies checksums for a package file
+ *
+ * Checks the integrity of a package file by verifying its checksums.
+ *
+ * @param package_path Path to the package file
+ * @return 0 on success, non-zero on failure
+ */
+int verify_checksums_package(const std::string& package_path);
+
+/**
+ * @brief Verifies checksums for a package stage directory
+ *
+ * Checks the integrity of a package stage directory by verifying its checksums.
+ *
+ * @param stage_dir Path to the stage directory
+ * @return 0 on success, non-zero on failure
+ */
+int verify_checksums_stage(const std::string& stage_dir);
+
+/**
+ * @brief Verifies signatures for a package file
+ *
+ * Checks the signatures of a package file.
+ *
+ * @param package_path Path to the package file
+ * @return 0 on success, non-zero on failure
+ */
+int verify_signature_package(const std::string& package_path);
+
+/**
+ * @brief Verifies signatures for a package stage directory
+ *
+ * Checks the signatures of a package stage directory.
+ *
+ * @param stage_dir Path to the stage directory
+ * @return 0 on success, non-zero on failure
+ */
+int verify_signature_stage(const std::string& stage_dir);