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/implementing-cloud-security-posture-management/SKILL.md

@@ -1,15 +1,27 @@
 ---
 name: implementing-cloud-security-posture-management
-description: >
-  Implementing Cloud Security Posture Management (CSPM) to continuously monitor multi-cloud
-  environments for misconfigurations, compliance violations, and security risks using Prowler,
-  ScoutSuite, AWS Security Hub, Azure Defender, and GCP Security Command Center.
+description: 'Implementing Cloud Security Posture Management (CSPM) to continuously monitor multi-cloud environments for misconfigurations,
+  compliance violations, and security risks using Prowler, ScoutSuite, AWS Security Hub, Azure Defender, and GCP Security
+  Command Center.
+
+  '
 domain: cybersecurity
 subdomain: cloud-security
-tags: [cloud-security, cspm, multi-cloud, compliance, prowler, scoutsuite]
-version: "1.0"
+tags:
+- cloud-security
+- cspm
+- multi-cloud
+- compliance
+- prowler
+- scoutsuite
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.IR-01
+- ID.AM-08
+- GV.SC-06
+- DE.CM-01
 ---
 
 # Implementing Cloud Security Posture Management