Feature/add has biometrics capabilities checking

[doms99]

Summary

• Added a supportsBiometricAuthentication method to check if device has any biometric authentication capabilities.
• Fixes potential race condition on iOS where save method returned a result before save callback was invoked which would case reading after saving in quick succession to return missing key error

Related issue: None

Changes

Type

• Feature: This pull request introduces a new feature.
• Bug fix: This pull request fixes a bug.
• Refactor: This pull request refactors existing code.
• Documentation: This pull request updates documentation.
• Other: This pull request makes other changes.

Additional information

• This pull request introduces a breaking change.

Checklist

• I have performed a self-review of my own code.
• I have tested my changes, including edge cases.
• I have added necessary tests for the changes introduced (if applicable).
• I have updated the documentation to reflect my changes (if applicable).

Additional notes