feat: enrich 209 skills with MITRE ATLAS, D3FEND, and NIST AI RMF frontmatter

Added structured security framework mappings to SKILL.md frontmatter across all applicable skills:
- atlas_techniques: MITRE ATLAS v5.5 AML.TXXXX IDs (81 skills, AI-targeted attack techniques)
- d3fend_techniques: MITRE D3FEND v1.3 defensive technique labels (139 skills, mapped from ATT&CK IDs)
- nist_ai_rmf: NIST AI RMF 1.0 subcategory IDs (85 skills, AI risk management functions)

Also updates ATTACK_COVERAGE.md with coverage statistics for all three frameworks.

skills/implementing-runtime-application-self-protection/SKILL.md

@@ -1,12 +1,26 @@
 ---
 name: implementing-runtime-application-self-protection
-description: Deploy Runtime Application Self-Protection (RASP) agents to detect and block attacks from within application runtime, covering OpenRASP integration, attack pattern detection, and security policy configuration for Java and Python web applications.
+description: Deploy Runtime Application Self-Protection (RASP) agents to detect and block attacks from within application
+  runtime, covering OpenRASP integration, attack pattern detection, and security policy configuration for Java and Python
+  web applications.
 domain: cybersecurity
 subdomain: application-security
-tags: [rasp, application-security, openrasp, runtime-protection, sqli, xss, rce, devsecops]
-version: "1.0"
+tags:
+- rasp
+- application-security
+- openrasp
+- runtime-protection
+- sqli
+- xss
+- rce
+- devsecops
+version: '1.0'
 author: mahipal
 license: Apache-2.0
+nist_ai_rmf:
+- GOVERN-1.1
+- MEASURE-2.7
+- MANAGE-3.1
 ---
 
 # Implementing Runtime Application Self-Protection