Add support for selecting specific days of the week

[JosDevv]

Hi,

First of all, thank you for maintaining this library; it has been incredibly useful!

I would like to request a feature that allows users to select specific days of the week (e.g., Monday, Wednesday, Friday) directly within the date picker.

Use case:
This feature would be particularly helpful in scenarios where users need to set recurring events or select dates based on specific weekdays. For instance:

• Scheduling classes on Mondays and Wednesdays.
• Picking recurring delivery days (e.g., every Friday).

Expected behavior:

• Users can choose one or more weekdays (e.g., via checkboxes or a dropdown).
• The date picker highlights or restricts the selection to the chosen days.

Possible implementation suggestions:

• Add a "day-of-week" selector as an optional configuration.
• Allow developers to define a set of weekdays that are enabled for selection.

Please let me know if this feature aligns with the roadmap or if I could contribute to its development in some way.

Thank you for considering this request!