Brings back the omarchy-install command as a 5-line shell wrapper that
just exec's /usr/share/omarchy/install.sh. Not the 258-line Python
refactor-poc version — that one stays dropped.
The omarchy package keeps excluding bin/omarchy-install exactly so it
doesn't conflict with the omarchy-installer package's copy at /usr/bin.
All 25+ user-facing omarchy-install-* commands (gaming, browser, etc.)
still ship via omarchy.
