output=guidelines is broken

[Glottotopia]

The output option output=guidelines should:

• set the series color to gray
• use onepage layout
• not print the impressum.

This used to work in the past, eg for https://github.com/langsci/guidelines/blob/master/latexguidelines/wrap-typesetters.tex, but it does not work for the current setup. My hunch is that some of the ifx branches make it so that the relevant code is never reached (or it was deleted altogether).

[kopeckyf]

I added a simple check that sets \lsSeries to guidelines automatically if output=guidelines is used as an option to \documentclass{langscibook}.

langscibook/langscibook.cls

Lines 897 to 900 in 9b1def8

	\input{langsci-series.def}
	\ifbool{guidelines}
	{\let\lsSeries\guidelines}
	{}

This solves your desiderata (1) and (3).