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/include/everest/gpio/gpio.hpp

@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2023 Pionix GmbH and Contributors to EVerest
+
+/*
+ This is a simple wrapper for accessing GPIOs via the Linux kernel's
+ GPIO Character Device Userspace API (v1). This API was introduced in Linux
+ kernel version 4.8.
+ This wrapper attempts to provide a simple interface to that API, for uses
+ in EVerest where simply setting or reading of a single GPIO is required.
+*/
+
+#ifndef GPIO_HPP
+#define GPIO_HPP
+
+#include <string>
+
+namespace Everest {
+
+struct GpioSettings {
+    std::string chip_name;
+    int line_number{0};
+    bool inverted{false};
+};
+
+class Gpio {
+public:
+    // open GPIO line
+    bool open(const std::string& chip_name, int line_number, bool inverted = false);
+    bool open(const GpioSettings& settings);
+
+    // free GPIO line
+    void close_all();
+
+    // Update the pin value in output mode. Do nothing in input mode.
+    void set(bool value);
+
+    // Set output mode with an initial value.
+    bool set_output(bool initial_value);
+
+    // Normally true means high, false means low. By setting this to true all outputs and inputs are inverted.
+    void invert_pin(bool inverted);
+
+    // Set to input mode.
+    bool set_input();
+
+    // Returns current pin value
+    bool read();
+
+    // indicated whether GPIO is ready to be used
+    bool is_ready();
+
+private:
+    int fd{0};
+    int line_fd{0};
+    int line_number{0};
+
+    // flag to indicate wether GPIO is ready to be used
+    bool ready{false};
+
+    // set to true to invert both input and output values
+    bool inverted{false};
+};
+} // namespace Everest
+
+#endif