Add CodeSight

[AvixoSec]

Adds CodeSight, an MIT-licensed LLM-powered CLI for automated code review, bug detection and security analysis.

• GitHub: https://github.com/AvixoSec/codesight
• PyPI: https://pypi.org/project/codesight
• Docs: https://codesight.is-a.dev
• Zenodo preprint (DOI 10.5281/zenodo.19672508): https://doi.org/10.5281/zenodo.19672508
• License: MIT
• Benchmarks: 91.5% detection on 47 vulnerable samples across 14 CWEs, 6.7% false positive rate. Beats Semgrep (12%) and CodeQL (25%) on logic-dependent vulnerabilities.
• Output: SARIF (GitHub Security tab), Markdown, JSON. GitHub Marketplace Action shipped.
• Multi-language: supports any language via LLM backends (Python, JS/TS, Go, Rust, Java, Solidity and more).

YAML entry added at data/tools/codesight.yml following the contributing guide.