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/configuring-microsegmentation-for-zero-trust/SKILL.md

@@ -1,12 +1,23 @@
 ---
 name: configuring-microsegmentation-for-zero-trust
-description: Configure microsegmentation policies to enforce least-privilege workload-to-workload access using tools like VMware NSX, Illumio, and Calico, preventing lateral movement in zero trust architectures.
+description: Configure microsegmentation policies to enforce least-privilege workload-to-workload access using tools like
+  VMware NSX, Illumio, and Calico, preventing lateral movement in zero trust architectures.
 domain: cybersecurity
 subdomain: zero-trust-architecture
-tags: [zero-trust, microsegmentation, network-access, lateral-movement, network-security]
-version: "1.0"
+tags:
+- zero-trust
+- microsegmentation
+- network-access
+- lateral-movement
+- network-security
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.AA-01
+- PR.AA-05
+- PR.IR-01
+- GV.PO-01
 ---
 
 # Configuring Microsegmentation for Zero Trust