feat(combobox): support all levels of autocomplete

[nsaritzky]

The spec for the ARIA Combobox design pattern lays out 4 levels of autocompletion. The Kobalte combobox currently supports the first two levels, but it stops there. This issue is to propose adding support for at least the third level, which is:

List autocomplete with automatic selection: The combobox is editable, and when the popup is triggered, it presents suggested values that complete or logically correspond to the characters typed in the combobox, and the first suggestion is automatically highlighted as selected. The automatically selected suggestion becomes the value of the combobox when the combobox loses focus unless the user chooses a different suggestion or changes the character string in the combobox.

This can make for a much more pleasant experience with a frequently-used box.

[masylum]

I think this is what I meant here: https://github.com/kobaltedev/kobalte/issues/608