fix: remove invalid skills array from plugin.json

feat: Enhanced validate-master-plan hook for dev-manager format enforcement

docs: Add dev-manager format requirements to skills/templates

feat: Dev-manager .env config + auto-create MASTER_PLAN.md

feat: Glass morphism design system + plugin-overview skill

docs: add comprehensive troubleshooting guide based on real-world issues

refactor: remove marketplace.json - now in separate repo

docs: update plugin-creator skill with actual validation rules discovered

fix: remove unrecognized keys from plugin.json (, category, tags, hooks, commands)

fix: source path must start with ./

feat: Claude Dev Infrastructure Plugin v1.0.0