add arduinoJson

lib/ArduinoJson/CMakeLists.txt

@@ -0,0 +1,25 @@
+# ArduinoJson - https://arduinojson.org
+# Copyright © 2014-2022, Benoit BLANCHON
+# MIT License
+
+cmake_minimum_required(VERSION 3.15)
+
+if(ESP_PLATFORM)
+   # Build ArduinoJson as an ESP-IDF component
+   idf_component_register(INCLUDE_DIRS src)
+   return()
+endif()
+
+project(ArduinoJson VERSION 6.20.0)
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+    include(CTest)
+endif()
+
+add_subdirectory(src)
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING)
+	include(extras/CompileOptions.cmake)
+	add_subdirectory(extras/tests)
+	add_subdirectory(extras/fuzzing)
+endif()