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/detecting-lateral-movement-with-zeek/SKILL.md

@@ -1,16 +1,27 @@
 ---
 name: detecting-lateral-movement-with-zeek
-description: >
-  Detect lateral movement in network traffic using Zeek (formerly Bro) log
-  analysis. Parses conn.log, smb_mapping.log, smb_files.log, dce_rpc.log,
-  kerberos.log, and ntlm.log to identify SMB file transfers, NTLM account
-  spray activity, remote service execution, and anomalous internal connections.
+description: 'Detect lateral movement in network traffic using Zeek (formerly Bro) log analysis. Parses conn.log, smb_mapping.log,
+  smb_files.log, dce_rpc.log, kerberos.log, and ntlm.log to identify SMB file transfers, NTLM account spray activity, remote
+  service execution, and anomalous internal connections.
+
+  '
 domain: cybersecurity
 subdomain: network-security
-tags: [zeek, lateral-movement, smb, dce-rpc, ntlm-spray, network-forensics]
-version: "1.0"
+tags:
+- zeek
+- lateral-movement
+- smb
+- dce-rpc
+- ntlm-spray
+- network-forensics
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.IR-01
+- DE.CM-01
+- ID.AM-03
+- PR.DS-02
 ---
 
 # Detecting Lateral Movement with Zeek