Consider support for terminal link extensions

[starpit]

Howdy! Some terminals seem to be offering an ansi extension to support terminal links.

ref: https://iterm2.com/documentation-escape-codes.html

the logic i think is something along these lines:

    const m = source.match(/\x1B\]8;;(.+)\u0007(.+)\x1B\]8;;\u0007/)
    if (m) {
      return (
        <span>
          {source.slice(0, m.index)}
          <a href={m[1]}>{m[2]}</a>
          {source.slice(m.index + m[0].length)}
         </span>
      )
    }