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-forest-trust-attack/SKILL.md

@@ -1,12 +1,24 @@
 ---
 name: performing-active-directory-forest-trust-attack
-description: Enumerate and audit Active Directory forest trust relationships using impacket for SID filtering analysis, trust key extraction, cross-forest SID history abuse detection, and inter-realm Kerberos ticket assessment.
+description: Enumerate and audit Active Directory forest trust relationships using impacket for SID filtering analysis, trust
+  key extraction, cross-forest SID history abuse detection, and inter-realm Kerberos ticket assessment.
 domain: cybersecurity
 subdomain: red-team
-tags: [active-directory, forest-trust, impacket, SID-filtering, kerberos, red-team, trust-enumeration]
-version: "1.0"
+tags:
+- active-directory
+- forest-trust
+- impacket
+- SID-filtering
+- kerberos
+- red-team
+- trust-enumeration
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- ID.RA-01
+- GV.OV-02
+- DE.AE-07
 ---
 
 # Performing Active Directory Forest Trust Attack