DetectorField: provide possibility for coordinate lookup

    /**

     * @brief FieldTable is a linearized 5x5 matrix

     */

    using FieldTable = std::array<double, 25>;

    class FieldTable : public std::array<double, 25> {

    public:

        /**

         * @brief Helper function to translate an iterator of the array into a coordinate of the 5x5 matrix.

         *

         * The central pixel has coordinates 0,0, the others around positive or negative values, respectively. This allows

         * to directly add these coordinates to any pixel index of the sensor.

         *

         * @param it Iterator to the array

         * @return Pair of x and y coordinates.

         */

        std::pair<int, int> getCoordinates(const FieldTable::iterator& it) {

            const auto i = std::distance(this->begin(), it);

            return {static_cast<int>(i % 5) - 2, static_cast<int>(i / 5) - 2};

        }

    };

    /**

     * @brief Helper function to invert the field vector when flipping the field direction at pixel/field boundaries