Add stagit lister

It's a cgit/gitweb like technology

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

Instances example [2]

Plan:

• swh/devel/swh-lister!486 (merged): Implementation
• swh/devel/swh-environment!273 (merged): List various instances in docker (see mr description)
• Deploy in staging
• Deploy in production
• (ongoing) Ingest forges [2]
• swh/devel/swh-web!1161 (merged): Reference in archive coverage widget and add type to add-forge-now ui

[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 swh/devel/swh-lister#1800 (moved)

changed the description

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

moved from swh/devel/swh-lister#4700 (moved)

mentioned in commit ardumont/swh-lister@6cb58f8a

mentioned in merge request swh/devel/swh-lister!486 (merged)

mentioned in commit ardumont/swh-lister@89ad7326

added ll-status::in-progress label

mentioned in commit swh/devel/swh-environment@b388090a

mentioned in merge request swh/devel/swh-environment!273 (merged)

changed the description

removed the relation with #5047 (closed)

mentioned in commit ardumont/swh-lister@c1221671

mentioned in commit ardumont/swh-lister@56b4fcc7

marked the checklist item swh/devel/swh-lister!486 (merged): Implementation as completed

mentioned in commit swh/infra/ci-cd/swh-charts@190b9002

marked the checklist item Deploy in staging as completed