Function lowercase_extension

app/cli/batch.cpp:27–33

}

std::string lowercase_extension(const std::filesystem::path & path) {
    std::string ext = path.extension().string();
    std::transform(ext.begin(), ext.end(), ext.begin(), [](unsigned char ch) {
        return static_cast<char>(std::tolower(ch));
    });
    return ext;
}

std::string read_text_file(const std::filesystem::path & path) {
    std::ifstream input(path);