[scheduler][joy] Add a month view

[flaviendelangle]

Follow up on #17699 and #17702

In this PR:

• Create a MonthView component that renders the current month using the Day Grid primitive
• Render the events received by the events prop

Not in this PR:

• Interacting with the event (drag&drop, click to open a popover, etc...)
• Navigating to other weeks than the current one

Full Calendar:

Bryntum:

Google Calendar:

Notion Calendar: