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/fsm/readme.rst

@@ -0,0 +1,24 @@
+========
+ libfsm
+========
+--------------------------------------------------------------------
+ a tiny c++ library for writing maintainable finite state machines
+--------------------------------------------------------------------
+
+Features
+========
+
+* compound states
+* heap free mode of operation
+
+Usage
+=====
+
+See the example in ``examples/light_switch``
+
+Todo
+====
+
+- improve documentation
+
+  - structure