fix(IT-Wallet): [SIW-3803,SIW-3658] A11y fixes: data toggle state, CIE animation

[MonicaRungi-EY]

Short description

This PR fixes two accessibility bugs on Android/iOS found during a11y testing: the "hide/show data" toggle on the IT-Wallet ID screen didn't announce its state to screen readers, and the CIE preparation screens (PIN/NFC) showed a looping GIF animation with no way to pause or stop it.

List of changes proposed in this pull request

• [ITWNC-25] IT-Wallet ID "hide data" button: the eye icon's accessibility label now changes based on the current state ("Mostra dati del mio IT-Wallet ID" / "Nascondi dati del mio IT-Wallet ID") instead of always announcing the static section title, so screen reader users know whether the data is currently shown or hidden.
• [ITWAL3-15] CIE preparation screens looping animation: the animated GIF illustration on the "Prepare your CIE PIN" and "Prepare your CIE for NFC reading" screens now automatically stops after 4 seconds (under the 5s threshold for uncontrollable moving content) and freezes on a static frame extracted from the animation.
  • Added itw_cie_pin_poster.png and itw_cie_nfc_poster.png as the frozen frames.
  • The shared ItwCiePreparationScreenContent component now accepts an optional posterSrc prop; screens using a static image only (CAN, Card) are unaffected.

How to test

ITWNC-25

1. Enable TalkBack
2. Navigate to the IT-Wallet ID detail screen
3. Focus the eye icon next to "Dati del mio IT-Wallet ID" and verify TalkBack announces "Nascondi dati del mio IT-Wallet ID" when data is visible.
4. Activate it, focus it again, and verify it now announces "Mostra dati del mio IT-Wallet ID".

ITWAL3-15

1. Navigate to the CIE identification flow, reaching the "Prepara il PIN della tua CIE" screen (or the NFC one).
2. Watch the illustration: it should stop moving and settle on a static frame within ~4 seconds.
3. Navigate away and back to the screen (or reopen it) and verify the animation replays from the start and stops again after ~4 seconds.

[github-actions]

PR Title Validation for conventional commit type

✅ All good! PR title follows the conventional commit type.

[github-actions]

Jira Pull Request Link

This Pull Request refers to Jira issues:

• SIW-3803
• SIW-3658

[codecov]

Codecov Report

❌ Patch coverage is 16.66667% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.79%. Comparing base (834209c) to head (b241a8a).

Files with missing lines	Patch %	Lines
.../cie/components/ItwCiePreparationScreenContent.tsx	10.00%	9 Missing ⚠️
...on/details/components/ItwPresentationPidDetail.tsx	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8454      +/-   ##
==========================================
- Coverage   63.81%   63.79%   -0.03%     
==========================================
  Files        1980     1980              
  Lines       37724    37736      +12     
  Branches     6370     6373       +3     
==========================================
  Hits        24075    24075              
- Misses      12265    12276      +11     
- Partials     1384     1385       +1     

Files with missing lines	Coverage Δ
...ication/cie/screens/ItwCiePreparationNfcScreen.tsx	10.00% <ø> (ø)
...ication/cie/screens/ItwCiePreparationPinScreen.tsx	10.00% <ø> (ø)
...on/details/components/ItwPresentationPidDetail.tsx	83.33% <50.00%> (-4.17%)	⬇️
.../cie/components/ItwCiePreparationScreenContent.tsx	25.00% <10.00%> (-25.00%)	⬇️

... and 1 file with indirect coverage changes

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