Method capitalize

subprojects/llama.cpp/common/jinja/string.cpp:137–145

    });
}
string string::capitalize() {
    return apply_transform(*this, [](const std::string & s) {
        if (s.empty()) return s;
        std::string res = s;
        res[0] = ::toupper(static_cast<unsigned char>(res[0]));
        std::transform(res.begin() + 1, res.end(), res.begin() + 1, ::tolower);
        return res;
    });
}
string string::titlecase() {
    return apply_transform(*this, [](const std::string & s) {
        std::string res = s;