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/modules/API/RpcApi/tests/helpers/JsonRpcUtils.hpp

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright chargebyte GmbH and Contributors to EVerest
+#ifndef JSON_RPC_UTILS_HPP
+#define JSON_RPC_UTILS_HPP
+
+#include "../../helpers/LimitDecimalPlaces.hpp"
+#include <nlohmann/json.hpp>
+#include <string_view>
+
+constexpr std::string_view JSON_RPC_SPEC_VERSION{"2.0"};
+
+namespace json_rpc_utils {
+
+inline nlohmann::json create_json_rpc_request(const std::string& method, const nlohmann::json& params, int id) {
+    nlohmann::json request;
+    request["jsonrpc"] = JSON_RPC_SPEC_VERSION;
+    request["method"] = method;
+    request["params"] = params;
+    request["id"] = id;
+    return request;
+}
+
+inline nlohmann::json create_json_rpc_response(const nlohmann::json& result, int id) {
+    auto tmp = result;
+    nlohmann::json response;
+    response["jsonrpc"] = JSON_RPC_SPEC_VERSION;
+    helpers::round_floats_in_json(tmp);
+    response["result"] = tmp;
+    response["id"] = id;
+    return response;
+}
+
+inline nlohmann::json create_json_rpc_error_response(int code, const std::string& message, int id) {
+    nlohmann::json error_response;
+    error_response["jsonrpc"] = JSON_RPC_SPEC_VERSION;
+    error_response["error"]["code"] = code;
+    error_response["error"]["message"] = message;
+    error_response["id"] = id;
+    return error_response;
+}
+
+// To check if single key-value pair is part of a JSON object. Key-value pair must be stored in a JSON object.
+inline bool is_key_value_in_json_rpc_result(const nlohmann::json& json_obj, const nlohmann::json& json_key_value) {
+    if (not json_key_value.is_object()) {
+        throw std::invalid_argument("json_key_value must be a JSON object");
+    }
+
+    // Check if the JSON object contains the key-value pair in the result object of the JSON-RPC response
+    if (json_obj.contains("result") && json_obj["result"].is_object()) {
+        const auto& result_obj = json_obj["result"];
+        if (result_obj.contains(json_key_value.begin().key()) &&
+            result_obj[json_key_value.begin().key()] == json_key_value.begin().value()) {
+            return true;
+        }
+    }
+    return false;
+}
+
+} // namespace json_rpc_utils
+
+#endif // JSON_RPC_UTILS_HPP