[feat] Add a default mode prop to the Calendar component

[dzole0311]

Does your feature request relate to a specific USWDS component?

Yes, it relates to the Calendar component within the DatePicker: https://github.com/trussworks/react-uswds/blob/5307046f9471215b04a9b33f6150ffab8b71aacc/src/components/forms/DatePicker/Calendar.tsx

What USWDS Version is this feature present in?

All versions.

Is your feature request related to a problem? Please describe.

Currently, the Calendar modes exist as local state. It would be beneficial to have these modes (or at least their default values) passed down as props. This would allow us to display only the MONTH_PICKER mode or the YEAR_PICKER mode as needed, especially after the Calendar gets exported as a standalone component: #2972.

Describe the solution you'd like

Please add a default mode prop to the Calendar component. This prop should allow setting the calendar modes (DAY_PICKER, MONTH_PICKER, YEAR_PICKER).

Additional context

N/A