* i18n: add Italian (it) UI translation
Adds an Italian interface catalog (crates/ui-egui/src/i18n/it.rs) covering every
key of the shared table and of the Arabic table (1,430 strings), written from the
English source using ordinary Italian desktop-publishing vocabulary.
Registers "Italiano" in Edit > Interface Language, wires it into tr(), and extends
the i18n and menu tests (lookup, no duplicates, full key coverage, translated menu
titles, language switch frames).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* contributors: add emanuelebonaventura (display name insanityxoff)
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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
