Add Sentinel AI to Python Tools

[MaxwellCalkin]

Summary

Adds Sentinel AI to the Python section under a new Tools subsection, following the JSON data format described in CONTRIBUTING.md.

Sentinel AI is an open-source (Apache 2.0) real-time safety guardrails library for LLM applications, providing:

• Prompt injection detection across 12 languages (English, Chinese, Japanese, Korean, Arabic, etc.)
• PII redaction (emails, SSNs, credit cards, phone numbers, etc.)
• OWASP code vulnerability scanning for generated code
• Dangerous tool call blocking for agentic AI workflows
• Sub-millisecond scan latency with zero ML dependencies (pure regex-based)
• 530-case benchmark suite with 100% accuracy (0 false positives, 0 false negatives)

Changes

• Added data/Python/tools/0001-sentinel-ai.json following the repository's JSON template format