v1.38.1 — package metadata catches up

Metadata only; no code change.

The READMEs were kept current with every release. The description strings were not — they were last written before v1.37.0 and never mentioned vecline serve at all, so the local Office bridge was invisible to anyone reading the npm listing rather than the repository.

package.json now names cut-ready DXF and the local bridge, and gains keywords for the audiences those serve. The registry and MCPB descriptions are capped near 100 characters and remain true at that level of abstraction, so they stand unchanged.