Add option to not "hide" the colon when 'keyword' highlight is "wide"

[KLimit]

I find it helpful to be able to see the colon after any keywords (though the default wide_bg does look nice). Found out that when the highlighter is configured with a wide-background keyword and foreground after, the colon will have its background and foreground set to the same color.

It's still the default to hide the colon in the above manner. To make it visible, I added a boolean option to config.highlight called colon_in_wide. Please change the naming if you have something that's clearer; I think colon_in_wide is a little clunky.

Here's how the options interact (no effect if "keyword" and "after" are both fg or bg):

keyword	after	colon_in_wide	result
wide_bg	fg	false
wide_bg	fg	true
wide_fg	bg	false
wide_fg	bg	true

[LunarLambda]

This can be fixed by my PR #255.

With it you can set

{
    highlight = {
        keyword = 'bg',
        pattern = [[.{-}<(\s?(KEYWORDS):)]],
    }
}

[github-actions]

This PR is stale because it has been open 60 days with no activity.