Create AUR package

[thomasnemer]

Package syld for the Arch User Repository so Arch users can install via their AUR helper.

Tasks:

• Create a syld or syld-bin PKGBUILD
• Set up an AUR repository and push the package
• Consider automating AUR updates on new releases

[thomasnemer]

Deferring until v1.0.0 — the CLI surface and feature set are still evolving. Publishing an AUR package before stabilization would create unnecessary maintenance burden.