plausible shortcode

in order to decouple header1.html and header2.html from the branding repository. Currently this is the only point for keeping these large headers in the branding repo.

• create shortcode {{ plausible domain }}
• adapt every page that needs to include this shortcode
• adapt header1.html and header2.html in pontifex-hugo
• delete header1.html and header2.html in pontifex-brand
• add customized shortcode {{plausible domain}} to pontifex-brand

changed milestone to %publication

created merge request !36 (merged) to address this issue

mentioned in merge request !36 (merged)

mentioned in commit 78af0673

closed with merge request !36 (merged)