Enables the sachesi/hyprland and avengemedia/dms COPRs, installs Hyprland,
DMS and the tools used by the scripts, optionally the Flatpak apps, then
deploys the configs into ~/.config. Existing configs are moved to
*.bak-<time>, so re-running is safe; --dry-run only prints the plan.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
