feat: create SkyEye Governance Layer with infra manifest, quota ledger, and service guards
Add the skyeye/ directory structure including:
- infra-manifest.json: infrastructure inventory and quota definitions
- quota-ledger.json: billing cycle tracking and health summary
- guards/: per-service guard configs (GitHub, Drive, Notion, Actions, Gemini)
- guards/guard-template.json: template for new service guards
- scripts/: placeholder files for scan-engine, optimizer, guard-factory,
quota-tracker, self-healer, and weekly-scan
- scan-report/, logs/daily/, logs/weekly/: empty dirs for future output
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>