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/performing-active-directory-penetration-test/SKILL.md

@@ -1,12 +1,26 @@
 ---
 name: performing-active-directory-penetration-test
-description: Conduct a focused Active Directory penetration test to enumerate domain objects, discover attack paths with BloodHound, exploit Kerberos weaknesses, escalate privileges via ADCS/DCSync, and demonstrate domain compromise.
+description: Conduct a focused Active Directory penetration test to enumerate domain objects, discover attack paths with BloodHound,
+  exploit Kerberos weaknesses, escalate privileges via ADCS/DCSync, and demonstrate domain compromise.
 domain: cybersecurity
 subdomain: penetration-testing
-tags: [active-directory, BloodHound, Kerberoasting, Impacket, DCSync, ADCS, domain-compromise, privilege-escalation]
-version: "1.0"
+tags:
+- active-directory
+- BloodHound
+- Kerberoasting
+- Impacket
+- DCSync
+- ADCS
+- domain-compromise
+- privilege-escalation
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- ID.RA-01
+- ID.RA-06
+- GV.OV-02
+- DE.AE-07
 ---
 
 # Performing Active Directory Penetration Test