Initial release of fizzy-cli skill.

• Provides command-line management of Fizzy kanban boards, cards, comments, tags, columns, users, and notifications.
• Supports authentication, configuration, and common CRUD workflows.
• Includes convenient commands for listing, creating, updating, and deleting Fizzy resources.
• Offers flexible output modes (human-readable, JSON, plain).
• Comprehensive Quick Start and troubleshooting guidance included.