Add extracted tools: CitrineOS, OpenOCPP, ShapeShifter

- CitrineOS core extracted (CSMS OCPP 2.0.1)
- OpenOCPP extracted (firmware OCPP 1.6J/2.0.1)
- ShapeShifter library installed (pip install -e)
- ShapeShifter specification extracted
- EVerest extracted

TODO updated with progress

tools/EVerest-main/lib/everest/framework/cmake/find-mqttc.cmake

@@ -0,0 +1,14 @@
+# FIXME (aw): quite hacky, should check at least if target already exists
+add_library(mqttc STATIC IMPORTED)
+
+find_library(MQTTC_LIB_FILE mqttc)
+find_path(MQTTC_INCLUDE_DIR mqtt.h)
+
+if(NOT MQTTC_LIB_FILE OR NOT MQTTC_INCLUDE_DIR)
+    message(FATAL_ERROR "Could not find mqttc library")
+endif()
+
+set_target_properties(mqttc PROPERTIES
+    IMPORTED_LOCATION ${MQTTC_LIB_FILE}
+    INTERFACE_INCLUDE_DIRECTORIES ${MQTTC_INCLUDE_DIR}
+)