Adding web readability score to performance tool

[quidampepin]

It would be great to add the Web readability score to the performance tool as an additional tab, like the page feedback info was added. The readability script is also in the alpha-canada-ca repo (https://github.com/alpha-canada-ca/lisibilite-web-readability).

https://readability-lisibilite.tbs.alpha.canada.ca/ requires a url and a lang argument.

Examples:

• https://readability-lisibilite.tbs.alpha.canada.ca/read_score?url=https://www.canada.ca/en/services/business/maintaining-your-business.html&lang=en
• https://readability-lisibilite.tbs.alpha.canada.ca/read_score?url=https://www.canada.ca/en/services/business/maintaining-your-business.html&lang=fr

Thanks,