[scheduler][joy] Add an option to render the week number in the "week", "day" and "month" views

[flaviendelangle]

Add a boolean prop that adds the current week number in every view that renders one or several days.

In this PR:

• Add the boolean prop to render the week number
• Render the week number in every available view (if any) when the prop is enabled

Not in this PR:

• Support custom UIs to render the week number

Full Calendar: