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/framework/include/utils/helpers.hpp

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Pionix GmbH and Contributors to EVerest
+
+#pragma once
+
+#include <limits>
+
+#include <utils/types.hpp>
+
+namespace Everest::helpers {
+template <typename T, typename U> T constexpr clamp_to(U len) {
+    return (len <= std::numeric_limits<T>::max()) ? static_cast<T>(len) : std::numeric_limits<T>::max();
+}
+} // namespace Everest::helpers