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/docs/source/explanation/adapt-everest/index.rst

@@ -0,0 +1,14 @@
+#############
+Adapt EVerest
+#############
+
+EVerest is designed to be easily adaptable to different use cases and
+environments. This section will guide you through the process of adapting
+EVerest to your specific needs by explaining the various sub-systems and APIs
+available.
+
+.. toctree::
+    :maxdepth: 1
+
+    sub-systems
+    apis