FEAT: added a new compilation option: red-help?.

This reduces both compilation time and executable size by roughly ~10%.

red-help?: <logic!>

    TRUE: include doc-strings from %boot.red
    FALSE: (default) do not include them.

The console compilation code in %red.r will take care of that, but manual compilation of %console.red will not (you need to add `red-help?: yes` in %config.r or better in a custom-made %custom-targets.r script).