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-usb-device-control-policy/SKILL.md

@@ -1,17 +1,27 @@
 ---
 name: implementing-usb-device-control-policy
-description: >
-  Implements USB device control policies to restrict unauthorized removable media access on
-  endpoints, preventing data exfiltration and malware introduction via USB devices. Use when
-  deploying device control via Group Policy, Intune, or EDR platforms to enforce USB restrictions.
-  Activates for requests involving USB control, removable media policy, device control, or
-  data loss prevention via USB.
+description: 'Implements USB device control policies to restrict unauthorized removable media access on endpoints, preventing
+  data exfiltration and malware introduction via USB devices. Use when deploying device control via Group Policy, Intune,
+  or EDR platforms to enforce USB restrictions. Activates for requests involving USB control, removable media policy, device
+  control, or data loss prevention via USB.
+
+  '
 domain: cybersecurity
 subdomain: endpoint-security
-tags: [endpoint, USB-control, device-control, data-loss-prevention, removable-media]
+tags:
+- endpoint
+- USB-control
+- device-control
+- data-loss-prevention
+- removable-media
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.PS-01
+- PR.PS-02
+- DE.CM-01
+- PR.IR-01
 ---
 # Implementing USB Device Control Policy