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/src/tun_tap/tap_handler.cpp

@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2020 - 2026 Pionix GmbH and Contributors to EVerest
+#include <cstring>
+#include <everest/io/tun_tap/tap_handler.hpp>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <linux/if.h>
+#include <linux/if_tun.h>
+
+#include <everest/io/socket/socket.hpp>
+
+namespace everest::lib::io::tun_tap {
+
+bool tap_handler::open(std::string const& device, std::string const& ip, std::string const& netmask, int mtu) {
+    m_mtu = mtu;
+    try {
+        m_fd = socket::create_tap_device(device);
+    } catch (...) {
+        m_error = EPERM;
+        return false;
+    }
+    if (not socket::configure_tap_device_properties(m_fd, device, ip, netmask, mtu)) {
+        m_error = EPERM;
+        m_fd.close();
+        return false;
+    }
+    m_error = 0;
+    return true;
+}
+
+bool tap_handler::tx(PayloadT const& data) {
+    auto res = ::write(m_fd, data.data(), data.size());
+    if (res != static_cast<ssize_t>(data.size())) {
+        m_error = errno;
+        return false;
+    }
+    m_error = 0;
+    return true;
+}
+
+bool tap_handler::rx(PayloadT& data) {
+    data.resize(m_mtu);
+    auto res = ::read(m_fd, data.data(), data.size());
+    if (res < 0) {
+        m_error = errno;
+        return false;
+    }
+
+    data.resize(res);
+    m_error = 0;
+    return true;
+}
+
+int tap_handler::get_fd() const {
+    return m_fd;
+}
+
+int tap_handler::get_error() const {
+    return m_error;
+}
+
+} // namespace everest::lib::io::tun_tap