feat(i18n): create language picker component

[MSzalowski]

Description

• Create a language picker component allowing to change language in the app.
• Placed that component on sign-in screen.
• Change setup of i18n for tests.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Change language using language picker component

Screenshot(s)

Test Configuration:

System:
    OS: macOS 13.0.1
    CPU: (8) arm64 Apple M1
    Memory: 79.61 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.16.0 - ~/.config/nvm/versions/node/v16.16.0/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 8.11.0 - ~/.config/nvm/versions/node/v16.16.0/bin/npm
    Watchman: Not Found
  Managers:
    CocoaPods: 1.11.3 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0
    Android SDK: Not Found
  IDEs:
    Android Studio: 2021.2 AI-212.5712.43.2112.8609683
    Xcode: 14.0.1/14A400 - /usr/bin/xcodebuild
  Languages:
    Java: 11.0.16.1 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.0.0 => 18.0.0
    react-native: 0.69.6 => 0.69.6
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

Checklist:

• Add correct label to your pull request
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules