Text FIX and additions on design section (see description)

[steps88]

Title

Content

• edited "Sistema" with "Brand"
• Adds specs in errors section as per Specify a proper error list for Primary Actors #729
• Adds UX flow for revocation and update of EAA
• fix verbs, order and minor changes

Review

• Ensure your files are written following RST specs (not MD!)
• Italian version
• English version
• Example files
• Ask for review

[Copilot]

Pull Request Overview

This pull request updates terminology and specifications throughout the documentation, transitioning from Italian terms like "Sistema" and "Pulsanti di Ingaggio" to English-based terms like "Brand" and "Engagement Button". The PR also enhances the error handling specifications by adding new error types to the errors section as referenced in issue #729.

Key Changes:

• Replaced Italian terminology with standardized English terms (e.g., "Pulsante di Ingaggio" → "Engagement Button", "Pulsante di Autenticazione" → "Authentication Button")
• Enhanced error specifications with additional error types for attestation issuance and management
• Clarified distinction between "Sistema IT-Wallet" (formal contexts) and "IT-Wallet" (brand/communications)
• Changed several interface requirements from "SHOULD" to "MUST" for consistency

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
docs/it/functionalities.rst	Updates Italian terminology to use English button names, adds selection page requirements, strengthens interface requirements from SHOULD to MUST, and removes redundant text in error section
docs/it/brand-identity.rst	Clarifies naming conventions distinguishing formal "Sistema IT-Wallet" from brand name "IT-Wallet", updates references from "Sistema" to "Brand", and fixes typo
docs/en/functionalities.rst	Adds selection page requirements for same-device flow, updates cross-device flow with camera option, corrects error table actor assignments, and adds new error types
docs/en/brand-identity.rst	Updates naming section to clarify formal vs. brand usage and changes "IT-Wallet System" to "IT-Wallet Brand" in visual identity section

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