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/yocto/scarthgap/meta-everest/recipes-extended/sigslot/sigslot_1.2.3.bb

@@ -0,0 +1,16 @@
+SUMMARY = "Sigslot, a signal-slot library"
+LICENSE = "MIT"
+
+LIC_FILES_CHKSUM = "file://LICENSE;md5=8e23355f85e3828bb4ed474a2df2f9b9"
+
+SRC_URI = "git://github.com/palacaze/sigslot.git;branch=master;protocol=https \
+           "
+
+SRCREV = "b588b791b9cf7eb17ff0a74d8aebd4a61166c2e1"
+
+S = "${WORKDIR}/git"
+
+inherit cmake
+
+# header only library
+RDEPENDS:${PN}-dev = ""