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/io/examples/test_serial.cpp

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2020 - 2025 Pionix GmbH and Contributors to EVerest
+
+/**
+ * @example test_serial.cpp Event based PTY handling for data and status updates.
+ */
+
+#include <cstdint>
+#include <cstring>
+#include <everest/io/event/fd_event_handler.hpp>
+#include <everest/io/event/timer_fd.hpp>
+#include <everest/io/serial/event_pty.hpp>
+#include <everest/io/serial/serial.hpp>
+#include <iostream>
+#include <string>
+#include <termios.h>
+#include <unistd.h>
+
+using namespace everest::lib::io;
+using namespace everest::lib::io::utilities;
+using namespace everest::lib::io::event;
+using namespace std::chrono_literals;
+
+int main() {
+    std::cout << "This is serial test" << std::endl;
+
+    // Create PTY
+    serial::event_pty handler;
+    // Register callback for data events
+    handler.set_data_handler([](auto const& pl, auto& dev) {
+        auto msg = std::string(pl.begin(), pl.end());
+        std::cout << " ##data update: " << msg << std::endl;
+
+        // generate reply and send it to the PTY
+        static auto counter = 0;
+        auto str = std::to_string(++counter) + "\n";
+        auto ptr = reinterpret_cast<uint8_t*>(str.data());
+        serial::event_pty::ClientPayloadT repl(ptr, ptr + str.size());
+        dev.tx(repl);
+    });
+
+    handler.set_status_handler([](auto const& status) {
+        std::cout << " ##status update" << std::endl;
+        // clang-format off
+        std::cout << " - ixon   -> " << status.ixon << "\n"
+                  << " - ixoff  -> " << status.ixoff << "\n"
+                  << " - cstopb -> " << status.cstopb << "\n"
+                  << " - baud   -> " << status.cbaud
+                  << std::endl;
+        // clang-format on
+    });
+
+    handler.set_error_handler([](int error, std::string const& err_msg) {
+        std::cout << "ERRORHANDLER: " << err_msg << "(" << error << ")" << std::endl;
+    });
+
+    // register the client with the event handler
+    fd_event_handler ev_handler;
+    ev_handler.register_event_handler(&handler);
+
+    while (true) {
+        ev_handler.poll();
+    }
+}