README-drawio.md

• Merge with main mermaid repository (https://github.com/mermaid-js/mermaid.git) (with the latest release tag)
• Fix any conflicts ensuring (format: 'umd') is still working
• Build npx pnpm install and test (file in packages/mermaid/dist/mermaid.min.js)
• Commit using --no-verify from command line git commit -m "MESSAGE" --no-verify
• Push