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-browser-forensics-with-hindsight/SKILL.md

@@ -1,12 +1,28 @@
 ---
 name: analyzing-browser-forensics-with-hindsight
-description: Analyze Chromium-based browser artifacts using Hindsight to extract browsing history, downloads, cookies, cached content, autofill data, saved passwords, and browser extensions from Chrome, Edge, Brave, and Opera for forensic investigation.
+description: Analyze Chromium-based browser artifacts using Hindsight to extract browsing history, downloads, cookies, cached
+  content, autofill data, saved passwords, and browser extensions from Chrome, Edge, Brave, and Opera for forensic investigation.
 domain: cybersecurity
 subdomain: digital-forensics
-tags: [browser-forensics, hindsight, chrome-forensics, chromium, edge, browsing-history, cookies, downloads, cache, web-artifacts]
-version: "1.0"
+tags:
+- browser-forensics
+- hindsight
+- chrome-forensics
+- chromium
+- edge
+- browsing-history
+- cookies
+- downloads
+- cache
+- web-artifacts
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- RS.AN-01
+- RS.AN-03
+- DE.AE-02
+- RS.MA-01
 ---
 
 # Analyzing Browser Forensics with Hindsight