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-android-malware-with-apktool/SKILL.md

@@ -1,12 +1,26 @@
 ---
 name: analyzing-android-malware-with-apktool
-description: Perform static analysis of Android APK malware samples using apktool for decompilation, jadx for Java source recovery, and androguard for permission analysis, manifest inspection, and suspicious API call detection.
+description: Perform static analysis of Android APK malware samples using apktool for decompilation, jadx for Java source
+  recovery, and androguard for permission analysis, manifest inspection, and suspicious API call detection.
 domain: cybersecurity
 subdomain: malware-analysis
-tags: [Android, APK, apktool, jadx, androguard, mobile-malware, static-analysis, reverse-engineering]
-version: "1.0"
+tags:
+- Android
+- APK
+- apktool
+- jadx
+- androguard
+- mobile-malware
+- static-analysis
+- reverse-engineering
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- DE.AE-02
+- RS.AN-03
+- ID.RA-01
+- DE.CM-01
 ---
 
 # Analyzing Android Malware with Apktool