fix: Wrong onHide signature

[Cosmin-Madalin]

Fixing: #735

This change does not introduce new behaviour or functionality but simply corrects the TypeScript definition to align with existing behaviour.

Previously, the onHide prop's TypeScript definition accepted a single Date parameter, representing the selected date when the modal is dismissed. However, the actual implementation passes two parameters: a boolean indicating whether the Confirm button was pressed, and a Date object if the Confirm button was pressed. The updated TypeScript definition now accurately reflects this functionality.

Test Plan

Confirm Button Press:

• Open the date-time picker.
• Select a date and press the Confirm button.
• Ensure that onHide is called with didPressConfirm set to true and currentDate reflecting the selected date.

Cancel Button Press:

• Open the date-time picker.
• Press the Cancel button without selecting a date.
• Ensure that onHide is called with didPressConfirm set to false, and currentDate is undefined.