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-cloud-forensics-with-aws-cloudtrail/SKILL.md

@@ -1,12 +1,26 @@
 ---
 name: performing-cloud-forensics-with-aws-cloudtrail
-description: Perform forensic investigation of AWS environments using CloudTrail logs to reconstruct attacker activity, identify compromised credentials, and analyze API call patterns.
+description: Perform forensic investigation of AWS environments using CloudTrail logs to reconstruct attacker activity, identify
+  compromised credentials, and analyze API call patterns.
 domain: cybersecurity
 subdomain: cloud-security
-tags: [cloud-security, aws, cloudtrail, forensics, incident-response, dfir, boto3, s3]
-version: "1.0"
+tags:
+- cloud-security
+- aws
+- cloudtrail
+- forensics
+- incident-response
+- dfir
+- boto3
+- s3
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.IR-01
+- ID.AM-08
+- GV.SC-06
+- DE.CM-01
 ---
 
 # Performing Cloud Forensics with AWS CloudTrail