Add 2 tools: UltraProbe (Red Teaming) + prompt-defense-audit (Guardrails)

[ppcvote]

Adds 2 tools to existing sections.

⚔️ Red Teaming & Vulnerability Scanners

• UltraProbe — Free hosted AI prompt audit. Scans a system prompt against 17 OWASP-LLM-Top-10-aligned attack vectors (incl. 5 agent-specific ones: encoding-aware injection, function semantic immutability, memory provenance, cross-agent auth, transaction guardrails) and returns an A–F grade with per-vector evidence. Hosted at ultralab.tw/probe; CLI also published as ultraprobe on npm. MIT.

🚧 Guardrails & Compliance

• prompt-defense-audit — Deterministic system-prompt scanner (npm). Same 17 vectors as the UltraProbe UI, plus 12 Unicode smuggling categories (Tag chars / Math alphanumeric / BiDi / Variation Selectors) and an output scanner with rules for JSON schema injection, OCR / Whisper / PDF modality marker hijack, tool-call argument injection, and SVG foreignObject HTML. Pure regex, <5ms, zero AI cost. MIT.

Both are MIT-licensed and actively maintained. Both align well with the agent-security focus of this list — the 5 agent-specific vectors above were derived from a structured analysis of six documented crypto AI agent incidents (Freysa, Lobstar Wilde, Grok×Bankrbot Morse, ElizaOS memory injection, etc.). Happy to adjust descriptions if shorter / different placement is preferred.