feat(l10n): localize country picker form field

[fulleni]

Status

READY/IN DEVELOPMENT/HOLD

Description

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[gemini-code-assist]

Summary of Changes

Hello @fulleni, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

I've implemented localization for the country picker form field. This change ensures that the search label, hint text, and the 'select a country' label within the country picker are properly translated based on the user's locale, improving the international user experience.

Highlights

• New Localization Keys: I've introduced three new localization keys: countryPickerSearchLabel, countryPickerSearchHint, and countryPickerSelectCountryLabel to support the internationalization of the country picker.
• Language Support: I've provided English and Arabic translations for these new keys across the .arb files and their corresponding Dart localization classes.
• UI Integration: I've updated country_picker_form_field.dart to utilize these newly localized strings, replacing previously hardcoded text with dynamic, translatable content.

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[gemini-code-assist]

Code Review

This pull request introduces localization for the country picker form field. It adds the necessary localization keys and their translations in English and Arabic, and updates the CountryPickerFormField widget to use these keys instead of hardcoded strings. The changes are well-implemented. I have one minor suggestion for file consistency.