feat: [IOPLT-1555] Properly handles app language selection and persistence

[CrisTofani]

Short description

This pull request refactors and simplifies the language and locale selection logic in the application streamlining related state management. It also cleans up unused saga code related to language preference synchronization and sets a default preferred language. The changes focus on improving maintainability and user experience for language selection in the preferences screen.

List of changes proposed in this pull request

• Feature A
• Feature B

How to test

Describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

[github-actions]

Jira Pull Request Link

This Pull Request refers to Jira issues:

• IOPLT-1555

[github-actions]

PR Title Validation for conventional commit type

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

[codecov]

Codecov Report

❌ Patch coverage is 31.57895% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.21%. Comparing base (2effdae) to head (bbf82a4).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
...preferences/screens/LanguagesPreferencesScreen.tsx	31.57%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7817      +/-   ##
==========================================
+ Coverage   60.19%   60.21%   +0.01%     
==========================================
  Files        1932     1932              
  Lines       42343    42328      -15     
  Branches     9710     9764      +54     
==========================================
- Hits        25489    25486       -3     
+ Misses      16778    16767      -11     
+ Partials       76       75       -1     

Files with missing lines	Coverage Δ
ts/config.ts	100.00% <ø> (ø)
ts/sagas/preferences.ts	0.00% <ø> (ø)
ts/sagas/startup.ts	38.66% <ø> (+1.00%)	⬆️
ts/store/reducers/persistedPreferences.ts	74.19% <ø> (ø)
...preferences/screens/LanguagesPreferencesScreen.tsx	53.52% <31.57%> (-3.63%)	⬇️

... and 1 file with indirect coverage changes

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