Update Italian translations (#6487)
* Update Italian translations
* Fix typo
* Update messages.po
* yarn intl:extract
* Update italian translation
* Fix typo
* In Italy we almost never use Title Case
* @marcomaroni-github suggestions
* Add more strings, remove "per favore"
* Update narrow "# hours"
* Fix plural rules, translate remaining strings
* Update translations with @arestifop suggestions
* Update translations
* Update translations
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Co-authored-by: Lucaterzo <49860098+Lucaterzo@users.noreply.github.com>
Co-authored-by: Alessio <alessio.restifo@gmail.com>