PEL: Print action flags into JSON aligned

"User Header": {
    "Section Version":          "1",
    "Sub-section type":         "0",
    "Log Committed by":         "0x4552",
    "Subsystem":                "System Hypervisor Firmware",
    "Event Scope":              "Entire Platform",
    "Event Severity":           "Informational Event",
    "Event Type":               "Miscellaneous, Informational Only",
    "Action Flags": [
                                "Report Externally"
    ]
}

Testing: Manually run peltool and verified output
Signed-off-by: Harisuddin Mohamed Isa <harisuddin@gmail.com>
Change-Id: Ie8376953b5f1baa093fc0aa9564d50cd4208564e
diff --git a/extensions/openpower-pels/json_utils.hpp b/extensions/openpower-pels/json_utils.hpp
new file mode 100644
index 0000000..14c2ce4
--- /dev/null
+++ b/extensions/openpower-pels/json_utils.hpp
@@ -0,0 +1,55 @@
+#pragma once
+
+#include <ctype.h>
+#include <stdio.h>
+
+#include <fstream>
+#include <iomanip>
+#include <iostream>
+#include <string>
+#include <vector>
+
+namespace openpower
+{
+namespace pels
+{
+const uint8_t indentLevel = 4;
+const uint8_t colAlign = 32;
+/**
+ * @brief escape json - use it for PEL hex dumps.
+ * @param[in] std::string - the unescaped JSON as a string literal
+ * @return std::string - escaped JSON string literal
+ */
+std::string escapeJSON(const std::string& input);
+
+/**
+ * @brief get hex dump for PEL section in json format.
+ * @param[in] const void* - Raw PEL data
+ * @param[i] size_t - size of Raw PEL
+ * @return char * - the Hex dump
+ */
+char* dumpHex(const void* data, size_t size);
+
+/**
+ * @brief Inserts key-value into a JSON string
+ *
+ * @param[in] jsonStr - The JSON string
+ * @param[in] fieldName - The JSON key to insert
+ * @param[in] fieldValue - The JSON value to insert
+ * @param[in] indentCount - Indent count for the line
+ */
+void jsonInsert(std::string& jsonStr, const std::string& fieldName,
+                std::string& fieldValue, uint8_t indentCount);
+
+/**
+ * @brief Inserts key-value array into a JSON string
+ *
+ * @param[in] jsonStr - The JSON string
+ * @param[in] fieldName - The JSON key to insert
+ * @param[in] values - The JSON array to insert
+ * @param[in] indentCount - Indent count for the line
+ */
+void jsonInsertArray(std::string& jsonStr, const std::string& fieldName,
+                     std::vector<std::string>& values, uint8_t indentCount);
+} // namespace pels
+} // namespace openpower