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/managing-cloud-identity-with-okta/SKILL.md

@@ -1,17 +1,26 @@
 ---
 name: managing-cloud-identity-with-okta
-description: >
-  This skill covers implementing Okta as a centralized identity provider for cloud
-  environments, configuring SSO integration with AWS, Azure, and GCP, deploying phishing-
-  resistant MFA with Okta FastPass, managing lifecycle automation for user provisioning
-  and deprovisioning, and enforcing adaptive access policies based on device posture
-  and risk signals.
+description: 'This skill covers implementing Okta as a centralized identity provider for cloud environments, configuring SSO
+  integration with AWS, Azure, and GCP, deploying phishing- resistant MFA with Okta FastPass, managing lifecycle automation
+  for user provisioning and deprovisioning, and enforcing adaptive access policies based on device posture and risk signals.
+
+  '
 domain: cybersecurity
 subdomain: cloud-security
-tags: [okta, cloud-identity, single-sign-on, phishing-resistant-mfa, identity-lifecycle]
+tags:
+- okta
+- cloud-identity
+- single-sign-on
+- phishing-resistant-mfa
+- identity-lifecycle
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- PR.IR-01
+- ID.AM-08
+- GV.SC-06
+- DE.CM-01
 ---
 
 # Managing Cloud Identity with Okta