[Add Skill] AuraKit — 37-mode fullstack development skill (revised)

[smorky850612]

Resubmitting with a factual technical description following feedback on #112.

AuraKit: https://github.com/smorky850612/Aurakit

Technical description:
37 modes activated via /aura [mode]: namespace (BUILD/FIX/CLEAN/DEPLOY/REVIEW + 32 extended). Security is enforced at 6 layers: agent role separation, disallowed-tools list, bash-guard.js (blocks rm -rf, force-push, etc.), security-scan.sh (blocks hardcoded secrets), npm audit at high severity, and Worktree isolation for subagents. 30 runtime hooks cover session lifecycle, file writes, pre-commit scanning, and subagent management. Includes 10 language-specific reviewers and an Instinct engine that saves patterns per project.

Install: npx @smorky85/aurakit

PR: #171