chore(eslint): add some unicorn rules

[csouchet]

https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-set-has.md
https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-set-size.md
https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-number-properties.md
https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-blob-reading-methods.md
https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/docs/rules/prefer-code-point.md

Covers #2742

[github-actions]

🎊 PR Preview f9cc305 has been successfully built and deployed to https://process-analytics-bpmn-visualization-js-doc_preview-pr-2925.surge.sh

🕐 Build time: 0.02s

_{🤖 By surge-preview}

[github-actions]

♻️ PR Preview f9cc305 has been successfully destroyed since this PR has been closed.

_{🤖 By surge-preview}

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

100.0% Coverage
0.0% Duplication

[tbouffard]

✔️ All checks pass
✔️ Tested with the surge preview environment: ensure that the Drag&Drop code is still working as we changed the loading logic based on the new eslint rules