Update Italian translations for various components

[napalmz]

Description

Updated some Italian translations.

Screenshot (if UI-related)

To-Dos

• Successful build yarn build
• Translation keys yarn i18n:extract
• Database migration (if required)

Issues Fixed or Closed

• None

[Copilot]

Pull request overview

Updates Italian (it) locale strings used across UI components to improve wording, capitalization, spacing, and fix typos.

Changes:

• Refined several UI labels/messages (e.g., “Appare in”, “In elaborazione”, spacing in “da {username}”).
• Corrected typos and brand casing (e.g., “Richiedi…”, “Plex”, “lista”).
• Adjusted a few translations to different phrasing (e.g., release date wording, slider success/failure messages).

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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[fallenbagel]

Thank you for your contributions! However, translations should be handled by weblate. Also this repo is no longer maintained. Please use https://github.com/seerr-team/seerr
seerr.

As for your translations, please add your translations to https://translate.seerr.dev