[Adiakys]

What changed

• AppStream metainfo (packaging/simrig.metainfo.xml): the app's card for software centres (GNOME Software, KDE Discover) and distribution repositories, with description, keywords, links, the app's colours, four screenshots and the releases up to 0.3.1. packaging/stage.sh installs it in /usr/share/metainfo/, so every package carries it from the next release. It validates with appstreamcli validate --no-net (one pedantic note: the uppercase in io.github.adiakys.SimRig, the usual style).
• Screenshots for it in docs/images/screenshots/, drawn by scripts/site.sh shots with the site's; the site's images are refreshed to the current app too.
• Site, Moza: the hardware tested (R21 Ultra, CS Pro, CRP2, HBP, SGP), the steering wheel on the base with its settings, shifters and handbrake showing up on the base by themselves; the home's list and the comparison with Boxflat follow.
• AUR package removed (packaging/aur): publishing to distribution repositories will come later, for every distribution together.

Why

The metainfo is what lets SimRig appear, with its page, in the software centres, and what distribution repositories need to list it. The site's Moza page was behind the latest releases.

For the reviewer

Each release adds its entry to the metainfo's <releases> (written in docs/development.md).