Add CUDA-Q Algorithms agent skill

[kvmto]

Summary

• add a NVIDIA-compatible cudaq-algorithms agent skill organized around BLAS/LAPACK-style operation-and-object contracts
• document ten source-grounded scientific families, their representations, composition capabilities, conventions, limitations, and evidence status
• add the catalog, architecture and validation guidance, canonical primitive-record template, and 21 evaluation cases
• explicitly separate installed contracts from roadmap-only concepts such as QROM, arithmetic, sparse-oracle encodings, eigensolver protocols, and THC

Validation

• static JSON, YAML, frontmatter, Markdown-link, catalog-coverage, and evaluation-mapping checks passed
• git diff --check passed
• IDE diagnostics reported no linter errors
• CUDA-Q runtime tests and SkillEvaluator runs were not performed; runtime/version verification and measured evaluator uplift remain unverified