Add --graph-report CLI flag for modern API coverage tree visualization with enhanced UX#10

dreamquality with Copilot wants to merge 6 commits into

maindreamquality/swagger-coverage-cli:mainfrom

copilot/fix-88b949f6-b8a0-4dcc-9129-66d1472cadeedreamquality/swagger-coverage-cli:copilot/fix-88b949f6-b8a0-4dcc-9129-66d1472cadeeCopy head branch name to clipboard