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/building-adversary-infrastructure-tracking-system/SKILL.md

@@ -1,12 +1,26 @@
 ---
 name: building-adversary-infrastructure-tracking-system
-description: Build an automated system to track adversary infrastructure using passive DNS, certificate transparency, WHOIS data, and IP enrichment to map and monitor threat actor command-and-control networks.
+description: Build an automated system to track adversary infrastructure using passive DNS, certificate transparency, WHOIS
+  data, and IP enrichment to map and monitor threat actor command-and-control networks.
 domain: cybersecurity
 subdomain: threat-intelligence
-tags: [infrastructure-tracking, passive-dns, c2, whois, threat-actor, pivoting, threat-intelligence, domain-analysis]
-version: "1.0"
+tags:
+- infrastructure-tracking
+- passive-dns
+- c2
+- whois
+- threat-actor
+- pivoting
+- threat-intelligence
+- domain-analysis
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- ID.RA-01
+- ID.RA-05
+- DE.CM-01
+- DE.AE-02
 ---
 # Building Adversary Infrastructure Tracking System