Cursor plugin specification and official plugins

Commits on cursor/continual-learning-agent-cli-b416

Prefer agent CLI for continual learning hook cursor/continual-learning-agent-cli-b416
Cursor Agent committed
Simplify continual-learning to one subagent continual-learning-agents-updater
ericzakariasson committed
Update create-plugin avatar update-create-plugin-avatar
eriknson committed
Update frontend plugin avatar update-frontend-avatar
eriknson committed
Add avatar to create-plugin add-create-plugin-avatar
eriknson committed