Class coordinates

src/examples/rpp/sfml/snake/utils.hpp:14–21

static constexpr size_t s_columns_count = 30;

struct coordinates
{
    int x{};
    int y{};

    bool operator==(const coordinates& other) const = default;
    bool operator!=(const coordinates& other) const = default;
};

using Direction = coordinates;
using SnakeBody = std::vector<coordinates>;