refactor: migrate Tenstorrent reader to upstream luwen 0.8.5 crates (#266)

Replace the self-republished all-smi-luwen-* fork crates with the upstream-published luwen 0.8.5 crates (luwen-api, luwen-pci, luwen-def; luwen-kmd transitive) in the Tenstorrent NPU reader, and remove the obsolete scripts/vendor_all_luwen.sh.

luwen 0.8.x sunset Grayskull and panics when opening one, so the reader detects Grayskull via a sysfs pre-check and skips it (with a catch_unwind defense in depth), keeping the release binary from aborting. Supported architectures are now Wormhole and Blackhole; README and man page updated accordingly.

Closes #265