- size:WxH and size:WxH@R resolution for config names
- auto-detection of external monitors when external list is empty (any non-internal display)
- ensureCleanLayout: explicitly disable connected monitors not in target layout
- update docs (README, example.yaml) for all three features
Extract shared resolveMonitorNames to backend package so both
Hyprland and Sway backends resolve desc: prefixed names to actual
connector names before applying monitor layout.
Previously the Hyprland backend wrote desc:... literally into
monitors.conf, which Hyprland ignores, causing monitors to be
positioned incorrectly or not configured at all.
