v1.4.3

What changed

bbfe3f2 release: v1.4.3
7a0076b fix: PPA workflow targets the vicine archive (renamed from ppa)
c82e09e fix: point PPA workflow at the actual spaciousejar/ppa archive
6c7df34 feat: Debian/Ubuntu PPA packaging + launchpad upload workflow
17c57c3 feat: package for more OSes — Homebrew formula, Scoop manifest, Nix flake + auto version bumps
f4cf70e docs: README restructure, CONTRIBUTING, hacking guide, disclaimer, issue/PR templates
5141732 chore: keep the AUR clone out of the repo; aur/PKGBUILD is the tracked canonical file
c17dce6 fix: track aur/PKGBUILD so the AUR workflow can read it (it was gitignored)
175696a ci: auto-publish AUR on release; bump aur PKGBUILD to 1.4.2