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/building-malware-incident-communication-template/SKILL.md

@@ -1,13 +1,28 @@
 ---
 name: building-malware-incident-communication-template
-description: Build structured communication templates for malware incidents including stakeholder notifications, executive briefings, technical advisories, and regulatory disclosures with severity-based escalation procedures.
+description: Build structured communication templates for malware incidents including stakeholder notifications, executive
+  briefings, technical advisories, and regulatory disclosures with severity-based escalation procedures.
 domain: cybersecurity
 subdomain: incident-response
-tags: [incident-communication, malware-response, stakeholder-notification, crisis-communication, executive-briefing, regulatory-disclosure]
-mitre_attack: ["T1566", "T1204", "T1027"]
-version: "1.0"
+tags:
+- incident-communication
+- malware-response
+- stakeholder-notification
+- crisis-communication
+- executive-briefing
+- regulatory-disclosure
+mitre_attack:
+- T1566
+- T1204
+- T1027
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- RS.MA-01
+- RS.MA-02
+- RS.AN-03
+- RC.RP-01
 ---
 
 # Building Malware Incident Communication Template