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-oauth-token-theft/SKILL.md

@@ -1,19 +1,30 @@
 ---
 name: detecting-oauth-token-theft
-description: >
-  Detects and responds to OAuth token theft and replay attacks in cloud
-  environments, focusing on Microsoft Entra ID (Azure AD) token protection,
-  conditional access policies, and sign-in anomaly detection. Covers access
-  token theft, refresh token replay, Primary Refresh Token (PRT) abuse, and
-  pass-the-cookie attacks. Activates for requests involving OAuth token theft
-  detection, token replay prevention, Azure AD conditional access token
-  protection, or cloud identity attack investigation.
+description: 'Detects and responds to OAuth token theft and replay attacks in cloud environments, focusing on Microsoft Entra
+  ID (Azure AD) token protection, conditional access policies, and sign-in anomaly detection. Covers access token theft, refresh
+  token replay, Primary Refresh Token (PRT) abuse, and pass-the-cookie attacks. Activates for requests involving OAuth token
+  theft detection, token replay prevention, Azure AD conditional access token protection, or cloud identity attack investigation.
+
+  '
 domain: cybersecurity
 subdomain: cloud-security
-tags: [oauth, token-theft, azure-ad, entra-id, conditional-access, token-replay, identity-security, PRT]
+tags:
+- oauth
+- token-theft
+- azure-ad
+- entra-id
+- conditional-access
+- token-replay
+- identity-security
+- PRT
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.IR-01
+- ID.AM-08
+- GV.SC-06
+- DE.CM-01
 ---
 
 # Detecting OAuth Token Theft