feat: add CUDA runtime installation helper

[binaryaaron]

Summary

• Add a helper for installing a selected supported CPU or CUDA runtime.
• Keep runtime selection aligned with the generated dependency manifest.

Validation

• Installer dry runs for CPU, CUDA 12.9, and CUDA 13.0

Final PR in the CUDA 13 stack; depends on #656.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch binaryaaron/cuda13/installer

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[greptile-apps]

Greptile Summary

The PR adds a runtime installation helper whose CPU and CUDA index sets are generated from the dependency manifest.

• Supports CPU, CUDA 12.9, and CUDA 13.0 runtime selection.
• Adds installer dry-run coverage and CI integration.
• Adds CUDA 13 container-build coverage and updates runtime documentation.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains; the prior platform-specific CPU test and help-handling issues are fixed in the current code.

Important Files Changed

Filename	Overview
install_nss.sh	Adds runtime normalization, generated package indexes, CUDA 13 driver validation, help handling, and uv command construction.
tests/tools/test_install_nss.sh	Covers CPU and CUDA dry-run commands, platform-specific CPU index behavior, help output, and unsupported runtime rejection.
tools/gen_cuda_deps.py	Extends dependency generation and drift checking to keep installer indexes synchronized with the manifest.
.github/workflows/ci-checks.yml	Runs installer dry-run validation in the end-user wheel-install job.
.github/workflows/container-build.yml	Adds the CUDA 13.0 container variant to the build matrix.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  Manifest[cuda_deps.toml] --> Generator[tools/gen_cuda_deps.py]
  Generator --> Metadata[pyproject.toml runtime metadata]
  Generator --> Installer[install_nss.sh generated indexes]
  User[Runtime selection] --> Installer
  Installer --> CPU[CPU install]
  Installer --> CU129[CUDA 12.9 install]
  Installer --> CU130[CUDA 13.0 install]
  Tests[Installer dry-run tests] --> Installer

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[mckornfield]

hehe bash test scripts