Offer Hybrid recovery from Vfio mode in toggle-hybrid-gpu

[ujo4eva]

Fixes #11868 (recovery half — the resume-hook atomicity half still needs a maintainer decision).

Problem

omarchy-toggle-hybrid-gpu only handles Integrated/Hybrid. When the force-igpu resume hook strands the persistent config in Vfio (its post step does Vfio -> Integrated and supergfxctl -m persists each step, so a failed trip back leaves "mode": "Vfio"), the only UI for this — Super+Ctrl+H > Hybrid GPU — dead-ends with Hybrid GPU not found or in unknown mode. The user has no guided way out.

Observed twice on HP CoffeeLake + GTX 1050 Max-Q (supported modes [Integrated, Hybrid, Vfio]): UnbindRemoveGpu: No such file or directory + rmmod nvidia_drm failed: Module nvidia_drm is in use → Could not confirm the GPU transition to Integrated mode, config left at Vfio, /run marker gone after reboot.

Change

Add a Vfio arm that offers return to Hybrid with the same cleanup the Integrated -> Hybrid path does (rewrite config to Hybrid, remove force-igpu hook + delay-start.conf, reboot). Vfio is never a resting state from this menu, so this mirrors existing behavior instead of inventing a new flow. Truly unknown modes still hit *).

Testing

• bash -n clean.
• Stubbed supergfxctl=gum=yes run through the Vfio path: rewrites config to Hybrid, removes hook + drop-in, calls omarchy-system-reboot, exit 0. Dedicated still exits 1 with the unknown-mode message; declining the Hybrid confirm still exits 0 without changes.
• test/shell.d/hybrid-gpu-test.sh and hw-hybrid-gpu-test.sh: all pass.
• ./test/all: only pre-existing environment failures (config, locate, snapper, unowned-system-paths — e.g. missing omarchy-pkgs checkout), verified identical on pristine omacom/quattro.