v1.0.0 - Initial release

Added

• Composite GitHub Action that generates SVG badges for OpenSpec metrics
• Four supported metrics: number_of_specs, number_of_requirements, tasks_status, open_changes
• Badge styles: classic (gradient) and flat (solid)
• OpenSpec pixel-art "OS" logo embedded in badges
• Automatic deployment to gh-pages branch with retry logic
• Color-coded badges based on project health
• CI workflow for dogfooding the action