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/io/README.md

@@ -0,0 +1,13 @@
+# everest_io {#mainpage}
+
+libeverest_io provides utilities for socket based communication.
+
+Currently there are clients for
+ - UDP
+ - SocketCAN
+ - MQTT
+ - PTY
+ - TCP
+ - TAP
+
+The clients are single threaded and epoll based. Utilities for file descriptor based event handling are provided and used.