Feat: datepicker

[iisakkirotko]

@maartenbreddels let me know what you think about the advanced example.

[iisakkirotko]

There is still some behaviour going on that I need to iron out:

• The Menu containing the calendar in the inputs does not close when tab or enter are pressed. Something resets this even when datepicker_is_open is set to False within use_change
• When an invalid date is entered by typing it in to the text field, the date resets to the previous valid one, while retaining error colours. This might be desirable behaviour, depending on who you ask.

[iisakkirotko]

Good to know that this relies on PRs #325 and #338.

[iisakkirotko]

Two things to note:

• Currently InputDate and InputDateRange don't support the blur event, or closing the datepicker on tab/enter
• InputDateRange will be tested on the front-end (playwright), since the TextField of that component is read only

[iisakkirotko]

Now also depends on https://github.com/widgetti/solara/pull/345

[maartenbreddels]

🥳

[iisakkirotko]