Support including header by URL

[YarikTH]

Godbolt supports including arbitrary files passing URL to the desired include. Like here:
https://godbolt.org/z/WEbKWojz5

#include "https://raw.githubusercontent.com/YarikTH/ureact/main/include/ureact/ureact.hpp"

int main() {
}

It allows a way more convenient way to benchmark code without copy-pasting full library content instead of including it.

It would be excellent to have such a feature in quick-bench too.