Introduce new JSON parser utility

This patch introduces a utility in OPAL based on the 3rd-party project
https://github.com/json-parser/json-parser.git

The utility provides APIs to read JSON into memory along with getters to
retrieve C values.

Signed-off-by: Wenduo Wang <wenduwan@amazon.com>

Author: wenduwan

config/opal_config_files.m4

@@ -4,7 +4,8 @@
 # Copyright (c) 2020      The University of Tennessee and The University
 #                         of Tennessee Research Foundation.  All rights
 #                         reserved.
-# Copyright (c) 2022      Amazon.com, Inc. or its affiliates.  All Rights reserved.
+# Copyright (c) 2022-2024 Amazon.com, Inc. or its affiliates.
+#                         All Rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -21,6 +22,8 @@ AC_DEFUN([OPAL_CONFIG_FILES],[
         opal/include/Makefile
         opal/datatype/Makefile
         opal/util/Makefile
+        opal/util/json/Makefile
+        opal/util/json/3rd-party/Makefile
         opal/util/keyval/Makefile
         opal/mca/base/Makefile
         opal/tools/wrappers/Makefile

opal/util/Makefile.am

@@ -17,7 +17,7 @@
 # Copyright (c) 2016      Research Organization for Information Science
 #                         and Technology (RIST). All rights reserved.
 # Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
-# Copyright (c) 2020      Amazon.com, Inc. or its affiliates.
+# Copyright (c) 2020-2024 Amazon.com, Inc. or its affiliates.
 #                         All Rights reserved.
 # Copyright (c) 2021      Google, LLC. All rights reserved.
 # $COPYRIGHT$
@@ -27,7 +27,9 @@
 # $HEADER$
 #
 
-SUBDIRS = keyval
+SUBDIRS = \
+        json \
+        keyval
 
 dist_opaldata_DATA = help-opal-util.txt
 
@@ -127,8 +129,10 @@ libopalutil_core_la_SOURCES += timings.c
 endif
 
 libopalutil_core_la_LIBADD = \
+        json/libopalutil_json.la \
         keyval/libopalutilkeyval.la
 libopalutil_core_la_DEPENDENCIES = \
+        json/libopalutil_json.la \
         keyval/libopalutilkeyval.la
 
 # Conditionally install the header files

opal/util/json/3rd-party/Makefile.am

@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2024      Amazon.com, Inc. or its affiliates.
+#                         All Rights reserved.
+# $COPYRIGHT$
+#
+# Additional copyrights may follow
+#
+# $HEADER$
+#
+
+noinst_LTLIBRARIES = libopalutil_json_3p.la
+
+libopalutil_json_3p_la_SOURCES = \
+	json.h \
+	json.c