* docs: add Italian (it) README translation
Adds README_it.md (full Italian translation of the English README) and updates the language nav bar in all existing READMEs to include the new [Italiano] link, appended at the end of the bar (after Bahasa Indonesia) to match the repository's convention for adding new languages.
Rebuilt on top of current main to resolve the merge conflict caused by the recently added Bahasa Indonesia (README_id.md) translation.
Closes#1453
* docs: fix Italian README showcase anchors
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Co-authored-by: morluto <76467478+morluto@users.noreply.github.com>