Convention: an off-by-default feature that needs nomarchy.* settings in the
downstream files should appear commented-out in templates/downstream/{home,
system}.nix, so a new install enables it by uncommenting + tweaking rather
than hunting the docs for the option name. Apply it now: night light,
nomarchy.monitors, per-device keyboard layouts (home.nix) and power
management (system.nix). Also fix the stale keyboard.layout note
(console/LUKS follow xkb automatically now). Documented in README S6.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
8d3911de1a