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/performing-binary-exploitation-analysis/SKILL.md

@@ -1,16 +1,23 @@
 ---
 name: performing-binary-exploitation-analysis
-description: >
-  Analyze binary exploitation techniques including buffer overflows and
-  ROP chains using pwntools Python library. Covers checksec analysis,
-  gadget discovery with ROPgadget, and exploit development for CTF and
-  authorized security assessments.
+description: 'Analyze binary exploitation techniques including buffer overflows and ROP chains using pwntools Python library.
+  Covers checksec analysis, gadget discovery with ROPgadget, and exploit development for CTF and authorized security assessments.
+
+  '
 domain: cybersecurity
 subdomain: offensive-security
-tags: [binary-exploitation, pwntools, rop-chains, buffer-overflow]
-version: "1.0"
+tags:
+- binary-exploitation
+- pwntools
+- rop-chains
+- buffer-overflow
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- ID.RA-01
+- GV.OV-02
+- DE.AE-07
 ---
 
 # Performing Binary Exploitation Analysis