Flet Flet_Auth control

Flet_Auth control to use in Flet apps.

1.Check Biometric Availability: Determine if the device supports biometric authentication.
2.Biometric Types: Identify the types of biometric authentication methods supported by the device. Common types include: Fingerprint recognition Face recognition Iris recognition 3.Authentication: Implement methods for biometric authentication. This includes verifying the user's identity by comparing their biometric data against enrolled samples. 4.Fallback Mechanism: Implement a fallback mechanism for cases where biometric authentication fails or is unavailable. This could involve using a PIN, pattern, or password as an alternative authentication method. 5.Error Handling: Handle errors gracefully during biometric authentication.