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-ticketing-system-for-incidents/SKILL.md

@@ -1,16 +1,29 @@
 ---
 name: implementing-ticketing-system-for-incidents
-description: >
-  Implements an integrated incident ticketing system connecting SIEM alerts to ServiceNow, Jira,
-  or TheHive for structured incident tracking, SLA management, escalation workflows, and compliance
-  documentation. Use when SOC teams need formalized incident lifecycle management with automated
-  ticket creation, assignment routing, and resolution tracking.
+description: 'Implements an integrated incident ticketing system connecting SIEM alerts to ServiceNow, Jira, or TheHive for
+  structured incident tracking, SLA management, escalation workflows, and compliance documentation. Use when SOC teams need
+  formalized incident lifecycle management with automated ticket creation, assignment routing, and resolution tracking.
+
+  '
 domain: cybersecurity
 subdomain: soc-operations
-tags: [soc, ticketing, servicenow, jira, thehive, incident-management, sla, workflow]
-version: "1.0"
+tags:
+- soc
+- ticketing
+- servicenow
+- jira
+- thehive
+- incident-management
+- sla
+- workflow
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- DE.CM-01
+- DE.AE-02
+- RS.MA-01
+- DE.AE-06
 ---
 # Implementing Ticketing System for Incidents