Function rm_leading_dashes

subprojects/llama.cpp/common/preset.cpp:11–17

#include <filesystem>

static std::string rm_leading_dashes(const std::string & str) {
    size_t pos = 0;
    while (pos < str.size() && str[pos] == '-') {
        ++pos;
    }
    return str.substr(pos);
}

// only allow a subset of args for remote presets for security reasons
// do not add more args unless absolutely necessary