fix(bios): wire numa_nps into the guided walk and verify pass

[VijitSingh97]

Summary

_bios_detect has detected and persisted a numa_nps item since #201, but _bios_guide and _bios_verify never wired it up:

• _bios_guide's pending-items loop only iterated memory_profile smt power_boost, so a pending NPS item never rendered in the guided walk, and could make the "Everything's already set" early-out fire while an EPYC rig was still sitting at NPS1.
• _bios_verify's per-item case had no numa_nps arm, so it hit *) continue — a saved numa_nps: pending item was silently dropped from both the applied and still-pending columns, and the state file was deleted (or a false "All BIOS items applied" printed) even though nothing was verified.

This fixes both spots:

1. Added numa_nps to _bios_guide's walk list, with a status line (ok/pending) mirroring the wording of doctor's NPS advisory (doctor/bios: detect NPS1 on EPYC — flag a NUMA-per-socket regression (detectable, currently silent) #201) — same target mode (NPS4) and "quadrant-local memory" phrasing.
2. Added a numa_nps arm to _bios_verify that re-runs the same _nps_suspect-backed detection _bios_detect uses, and classifies the item as applied (NPS4 seen) or still pending, consistent with how the other three items verify — including the kept/rewrite bookkeeping so a NPS item that did take doesn't get carried forward into the resaved state.

The "Everything's already set" early-out was already correct once NPS participates in the same pending-list loop as the other three items — it fires only when the loop builds an empty pending list across all four.

Tests

Added the three tests called out in the issue, next to the existing _bios tests in tests/run.sh (reusing the $NPS/one / $NPS/four node-count fixtures from the existing #201 detection tests):

1. Guide with only numa_nps pending → the NPS step renders, "Everything's already set" does not fire.
2. Verify with numa_nps: pending in state and detection still reporting NPS1 → stays pending, no "All BIOS items applied", state file survives.
3. Verify with detection now reporting NPS4 → counted applied, state file removed.

make test (shellcheck + shfmt + the full suite): 1348 passed, 0 failed. Confirmed all 3 new test blocks (7 of 9 assertions) go red against the unfixed code before re-applying the fix.

Closes #268

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