feat: add NIST CSF 2.0 nist_csf field to all 754 cybersecurity skills

Mapped every skill to NIST CSF 2.0 subcategory IDs (GV/ID/PR/DE/RS/RC functions)
based on subdomain and content analysis. Restores 11 skills corrupted during
prior rebase, re-enriching with ATLAS, D3FEND, NIST AI RMF, and CSF 2.0 fields.

All 754 skills now carry structured mappings for all 5 security frameworks:
- MITRE ATT&CK (in tags)
- MITRE ATLAS v5.5 (atlas_techniques)
- MITRE D3FEND v1.3 (d3fend_techniques)
- NIST AI RMF 1.0 (nist_ai_rmf)
- NIST CSF 2.0 (nist_csf)

skills/integrating-sast-into-github-actions-pipeline/SKILL.md

@@ -1,17 +1,28 @@
 ---
 name: integrating-sast-into-github-actions-pipeline
-description: >
-  This skill covers integrating Static Application Security Testing (SAST) tools—CodeQL
-  and Semgrep—into GitHub Actions CI/CD pipelines. It addresses configuring automated code
-  scanning on pull requests and pushes, tuning rules to reduce false positives, uploading
-  SARIF results to GitHub Advanced Security, and establishing quality gates that block merges
-  when high-severity vulnerabilities are detected.
+description: 'This skill covers integrating Static Application Security Testing (SAST) tools—CodeQL and Semgrep—into GitHub
+  Actions CI/CD pipelines. It addresses configuring automated code scanning on pull requests and pushes, tuning rules to reduce
+  false positives, uploading SARIF results to GitHub Advanced Security, and establishing quality gates that block merges when
+  high-severity vulnerabilities are detected.
+
+  '
 domain: cybersecurity
 subdomain: devsecops
-tags: [devsecops, cicd, sast, codeql, semgrep, secure-sdlc]
+tags:
+- devsecops
+- cicd
+- sast
+- codeql
+- semgrep
+- secure-sdlc
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.PS-01
+- GV.SC-07
+- ID.IM-04
+- PR.PS-04
 ---
 
 # Integrating SAST into GitHub Actions Pipeline