Add Support for Customizing the DatePicker's Minimum and Maxium Selectable Dates

[wrakocy]

What changed

• Added PickerMinDate and PickerMaxDate parameters to the main MudCalendar component
• Forwarding new parameters to the underlying CalendarDatePicker
• Added test component with backing bunit test to verify new functionality

Why

MudCalendar currently exposes a date picker for navigation, but currently does not allow consumers to constrain the selectable date range. This makes it difficult to prevent users from navigating to dates that are outside the valid bounds of the underlying data (e.g., historical limits, future scheduling restrictions, business rules).

Adding PickerMinDate and PickerMaxDate aligns MudCalendar's CalendarDatePicker more closely with the capabilities of MudDatePicker, avoids the need for custom wrappers or workarounds, and allows consumers to enforce valid date ranges declaratively.

Notes

• No breaking changes
• Screenshot of new test UI attached

[danheron]

Thanks!