Select Group feature

[wiktorkujawa]

In select component, we can only create Items without groups. It would be great to introduce SelectGroup:

<Select>
  <Select.Group>
    <Select.Item/>
    <Select.Item/>
  <Select.Group/>

  <Select.Group>
    <Select.Item/>
    <Select.Item/>
  <Select.Group/>
</Select>

F.e: I have select list and on choosing the item, it disappear from group and is displayed on chip component, however I want to limit(disable items) only from this group, on which I selected x items, which can't be done after flattering the groups array. And also visually it's better, than passing some text components between items.