Add Date Picker component

[hubingliang]

No description provided.

[saadeghi]

I will add a calendar but it will be just a visual representation.
If you want a fully working date picker input field that you can choose day, month, year and you want the chosen values to be shown in the input field, that's not possible on a CSS-only library.
I suggest using browser's native date input:

<input type="date" class="input">