feat: vendorizar as 10 skills do pilar de seguranca em skills/

Copia local (nao fork, nao submodule) de safedeps, sca-audit,
secrets-scan, code-review-security, api-security-review,
web-security-review, cve-triage, patch-prioritization,
dependency-scanning e hermaguard -- commit exato de origem e licenca
de cada uma em skills/NOTICE.md. Elimina o passo de clone externo
pro pilar de seguranca do wf-security-review: git clone deste repo
ja traz tudo funcional.

Corrige tambem o comando de instalacao pro Claude Code nos dois
READMEs e no docs/SKILLS.md: Claude Code exige um diretorio por
skill (skills/<nome>/SKILL.md), nao aceita os .md soltos que o
comando antigo copiava -- confirmado testando a instalacao real.

skills/sca-audit/SKILL.md

@@ -0,0 +1,35 @@
+---
+name: sca-audit
+description: Scan project dependencies for known vulnerabilities (CVEs). Use when reviewing dependency files (package.json, requirements.txt, go.mod, pom.xml, Gemfile, Cargo.toml, etc.), triaging Dependabot/Renovate alerts, or performing pre-deployment security checks.
+license: CC-BY-4.0
+---
+
+# Software Composition Analysis Audit
+
+Scan dependencies for known CVEs by following the full procedure in `plays/sca-audit.md`.
+
+## Steps
+
+1. **Identify Dependency Manifests** — Scan for all dependency files and lockfiles across ecosystems (Node.js, Python, Go, Java, Ruby, Rust, .NET, PHP). Prefer lockfiles for exact resolved versions.
+
+2. **Run Vulnerability Scan** — Use available tools in preference order:
+   - `osv-scanner --lockfile=<path> --format=json` (recommended, multi-ecosystem)
+   - `npm audit --json` (Node.js)
+   - `pip-audit -r requirements.txt --format=json` (Python)
+   - `govulncheck ./...` (Go)
+   - `trivy fs --format json --scanners vuln <path>` (multi-ecosystem)
+   - If no scanner is installed, **stop and ask the user to install one** (e.g., `brew install osv-scanner`). Manual analysis is not viable — even small projects have 50+ dependencies. For individual package triage, point the user to [OSV.dev](https://osv.dev/list).
+
+3. **Analyze Results** — For each vulnerability: determine reachability (is the vulnerable code path used?), check exploitability context (deployment matters), and identify fix availability (patch vs major version bump).
+
+4. **Dependency Health** — Beyond CVEs, flag unmaintained packages (2+ years inactive), typosquatting risks, license concerns, and version pinning issues.
+
+## Output
+
+Scan summary (ecosystems, dependency count, scanner used), findings sorted by severity using `templates/finding.md`, condensed table for medium/low, dependency health flags, and exact remediation commands.
+
+## OWASP References
+
+- A06:2021: Vulnerable and Outdated Components
+- OWASP Dependency-Check
+- OWASP SCVS