[scheduler][joy] Add a day view

[flaviendelangle]

Follow up on #17695.

Allow to render only one day instead of seven.
The code of the week view should be re-used as much as possible.

In this PR:

• Create a DayView component that uses the same internals as the WeekView component but render only one day (with as little code duplication as possible)
• Go to the day view when clicking on a day in the header of the week view