Adds an Italian catalog (crates/ui-egui/src/i18n/it.tsv, 3,549 rows in
es.tsv's order) covering every menu string, every tl! literal, the
plurals and every status/error message, at the same scope as Spanish.
Standard Italian in sentence case, written clean-room from the meaning
of the English labels; the product, workspace, perspective preset and
language names stay in English as in es and ja.
Registered as "Italiano" with the one/other plural rule and
complete_menus; every it-* locale resolves to it. Tests: it joins
KEEPS_MENU_NAMES and COMPLETE_MESSAGES, italian_reads_as_italian checks
vocabulary and plurals, tags_map_to_languages the locale tags, and the
bundled-font glyph test covers Italian accents and guillemets. README,
ROADMAP and docs/development.md list the language.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011iayep93edeimiAE8oSfaT
7c7ae55625