Move nomarchy-airplane to pkgs/ so checks can import it. checks.airplane
covers the session state machine, menu/keybind surfaces, and whole-swap
waybar parity (mocked nmcli; live radios stay V3). checks.fastfetch-logo
asserts the baked mark is sextant-based with the module flags locked in.
Airplane: runtime Wi-Fi+Bluetooth kill-switch with prior-state restore,
System menu + SUPER+CTRL+R, Waybar plane glyph (self-hides, whole-swap
parity). Fastfetch: chafa sextants at 24×12 (was block 20×10) for a
finer monogram; V2 kitty screenshots under boreal and summer-night.
