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/gpio/BUILD.bazel

@@ -0,0 +1,9 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "gpio",
+    srcs = ["src/gpio.cpp"],
+    hdrs = ["include/everest/gpio/gpio.hpp"],
+    visibility = ["//visibility:public"],
+    includes = ["include"],
+)