Extracting weekdays from header component

[KonradLinkowski]

Adding anything to the <thead> feels like a chore currently.
For example, adding a simple today button requires:

• copying the entire content of Head
• copying the implementation of getWeekdays

Extracting the weekdays' row to a separate component would allow using it like this:

const NewHead = () => {
  const {
    classNames,
    styles,
  } = useDayPicker();
  
  return (
    <thead>
      {/* additional content here */}
      <WeekdaysRow />
    </head>
  )
}

<DayPicker
  components={{ Head: NewHead }}
/>

Is there already a way of doing this without copying the entire Head component?

[gpbl]

@KonradLinkowski this is a good idea! Would you mind to propose a PR with this change?

[KonradLinkowski]

I created a PR #1533, let me know if there is anything that should be improved