feat: full ecosystem integration for PR #435 (5 security skills) and PR #436 (self-eval)

- Updated domain plugin.json counts (engineering-team: 36, engineering: 36)
- Added 6 new skills to mkdocs.yml navigation
- Updated engineering-team/CLAUDE.md with security skills section
- Generated docs pages for all 6 new skills
- Synced Codex + Gemini indexes and symlinks
- Ran cross-platform conversion (Cursor, Aider, Windsurf, KiloCode, OpenCode, Augment, Antigravity)

https://claude.ai/code/session_01XY4i7SR4BHLWJpdjwGnNLG

engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "engineering-advanced-skills",
-  "description": "35 advanced engineering skills: agent designer, agent workflow designer, AgentHub, RAG architect, database designer, migration architect, observability designer, dependency auditor, release manager, API reviewer, CI/CD pipeline builder, MCP server builder, skill security auditor, performance profiler, Helm chart builder, Terraform patterns, focused-fix, browser-automation, spec-driven-workflow, secrets-vault-manager, sql-database-assistant, and more. Agent skill and plugin for Claude Code, Codex, Gemini CLI, Cursor, OpenClaw.",
+  "description": "36 advanced engineering skills: agent designer, agent workflow designer, AgentHub, RAG architect, database designer, migration architect, observability designer, dependency auditor, release manager, API reviewer, CI/CD pipeline builder, MCP server builder, skill security auditor, performance profiler, Helm chart builder, Terraform patterns, focused-fix, browser-automation, spec-driven-workflow, secrets-vault-manager, sql-database-assistant, and more. Agent skill and plugin for Claude Code, Codex, Gemini CLI, Cursor, OpenClaw.",
   "version": "2.1.2",
   "author": {
     "name": "Alireza Rezvani",