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/conducting-network-penetration-test/SKILL.md

@@ -1,18 +1,28 @@
 ---
 name: conducting-network-penetration-test
-description: >
-  Conducts comprehensive network penetration tests against authorized target environments by
-  performing host discovery, port scanning, service enumeration, vulnerability identification,
-  and controlled exploitation to assess the security posture of network infrastructure. The
-  tester follows PTES methodology from reconnaissance through post-exploitation and reporting.
-  Activates for requests involving network pentest, infrastructure security assessment,
-  internal network testing, or external perimeter testing.
+description: 'Conducts comprehensive network penetration tests against authorized target environments by performing host discovery,
+  port scanning, service enumeration, vulnerability identification, and controlled exploitation to assess the security posture
+  of network infrastructure. The tester follows PTES methodology from reconnaissance through post-exploitation and reporting.
+  Activates for requests involving network pentest, infrastructure security assessment, internal network testing, or external
+  perimeter testing.
+
+  '
 domain: cybersecurity
 subdomain: penetration-testing
-tags: [network-pentest, Nmap, Metasploit, vulnerability-exploitation, infrastructure-security]
+tags:
+- network-pentest
+- Nmap
+- Metasploit
+- vulnerability-exploitation
+- infrastructure-security
 version: 1.0.0
 author: mahipal
 license: Apache-2.0
+nist_csf:
+- ID.RA-01
+- ID.RA-06
+- GV.OV-02
+- DE.AE-07
 ---
 # Conducting Network Penetration Test