Added files

src/file_utils.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "common.h"
+
+#include <cstddef>
+#include <filesystem>
+
+enum class FileTypeCheck : std::uint8_t {
+    cover_image  = 1,
+    script_file  = 2,
+    payload_file = 3
+};
+
+[[nodiscard]] vBytes readFile(
+    const std::filesystem::path& path,
+    FileTypeCheck file_type = FileTypeCheck::script_file);