Translation of the 2022 Markup chapter to Italian (#3327)

* Create the /it/2022/markup.md file as a copy from English

* Translate 2022 markup chapter to Italian

* Fix a typo

* Fix some typos

* Modify static/js/web-vitals.js through npm run generate

* Progress on markup chapter transaltion to Italian

* Make progress on markup chapter translation to Italian

* Fix wrong amount of left-padding spaces lines 99-104

* Fix web-vitals

* Revert "Fix web-vitals"

This reverts commit 3e95778.

* Fix web-vitals

* Lang attaributes

Co-authored-by: Barry Pollard <barrypollard@google.com>

Author: webmatter-it