Report Omarchy to Steam instead of Arch Linux

[spaceXrace]

Summary

• ship an Omarchy-specific /etc/lsb-release override
• apply it from both stable and development omarchy-settings packages
• keep the release value as rolling so reporting is not split across Omarchy patch versions

Why

Omarchy already identifies itself correctly in /etc/os-release:

ID=omarchy
ID_LIKE=arch
NAME="Omarchy"

However, Arch's steam package depends on lsb-release, whose /etc/lsb-release currently says:

DISTRIB_ID="Arch"
DISTRIB_RELEASE="rolling"
DISTRIB_DESCRIPTION="Arch Linux"

Steam's launcher checks /etc/lsb-release before /etc/os-release. On a stock Omarchy 4.0.2 installation this is visible in ~/.local/share/Steam/logs/console-linux.txt:

Running Steam on arch rolling 64-bit

Steam's public hardware survey does not currently list Omarchy as a distinct Linux version. Although the public table only exposes entries above its reporting cutoff, the client-side value shows that native Steam installations submit/use the Arch identity at this detection point.

With this override, the same Steam detection path resolves to:

omarchy rolling 64-bit

Verification

• bash -n passes for both PKGBUILDs and install scripts
• all repository self-tests pass:
  • ./bin/sync-upstream self-test
  • ./bin/omarchy-pkgs self-test
  • ./bin/omarchy-release self-test
• omarchy-settings builds successfully with makepkg
• inspected the built archive to verify the new override and install-script copy are present