feat: ray, nemo, ngc-container, and blueprint cluster command groups

[jamesbeedy]

Adds v8x CLI coverage for the new vdeployer-web NVIDIA AI stack endpoints (KubeRay + NeMo platform).

New command groups under v8x cluster

• ray — KubeRay job lifecycle against /ray/*:
  • create NAME -c CLUSTER -e ENTRYPOINT [-n NS] [-C preset] [-p size-preset] [--overrides-json ...]
  • list, get, delete for RayJobs
  • clusters [NAME] — list RayClusters or show one
• nemo — read-only NeMo microservices catalog passthrough (/nemo/*, JSON verbatim):
  • customization-configs, customization-targets, evaluation-configs
• ngc-container — curated NGC framework container catalog (/ngc/containers):
  • list [--purpose training|workspace|serving], get NAME
• blueprint — curated NVIDIA AI Blueprint catalog (/blueprints):
  • list [--status available|roadmap], get ID

Also bumps vantage-sdkpy to >=0.1.22 for the new ray_job / nvidia_catalogs SDK modules (companion vantage-sdkpy PR).

Notes

• CI will stay red on dependency resolution until vantage-sdkpy 0.1.22 is released to PyPI; validated locally with an editable SDK install (ruff clean, 98 unit tests pass, all new --help paths smoke-tested).
• uv.lock intentionally untouched — regenerate after the sdkpy release.