Add stagit lister

It's a cgit/gitweb like technology

"stagit is a static page generator for git." [1]

Instances example [2]

[1] https://codemadness.org/stagit.html

[2] (Thx @guillaume for the listing again ;)

• https://git.acid.vegas/
• https://a3nm.net/git/
• https://www.brianlane.com/git/
• https://git.codemadness.org/
• https://git.tronto.net/
• https://git.2f30.org/

marked this issue as related to #1800 (moved)

changed the description

changed milestone to %Extend archive coverage [Roadmap - Collect]

closed

moved to swh/meta#5048 (closed)