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/analyzing-malware-behavior-with-cuckoo-sandbox/SKILL.md

@@ -1,17 +1,27 @@
 ---
 name: analyzing-malware-behavior-with-cuckoo-sandbox
-description: >
-  Executes malware samples in Cuckoo Sandbox to observe runtime behavior including
-  process creation, file system modifications, registry changes, network communications,
-  and API calls. Generates comprehensive behavioral reports for malware classification
-  and IOC extraction. Activates for requests involving dynamic malware analysis, sandbox
-  detonation, behavioral analysis, or automated malware execution.
+description: 'Executes malware samples in Cuckoo Sandbox to observe runtime behavior including process creation, file system
+  modifications, registry changes, network communications, and API calls. Generates comprehensive behavioral reports for malware
+  classification and IOC extraction. Activates for requests involving dynamic malware analysis, sandbox detonation, behavioral
+  analysis, or automated malware execution.
+
+  '
 domain: cybersecurity
 subdomain: malware-analysis
-tags: [malware, dynamic-analysis, sandbox, Cuckoo, behavioral-analysis]
+tags:
+- malware
+- dynamic-analysis
+- sandbox
+- Cuckoo
+- behavioral-analysis
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- DE.AE-02
+- RS.AN-03
+- ID.RA-01
+- DE.CM-01
 ---
 
 # Analyzing Malware Behavior with Cuckoo Sandbox