[Feat]: Extend ComboboxOption to support disabled state of menu items

[spdev3000]

Code of conduct

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Impacted component(s)

Combobox

Description of the requested feature

As a user I'd like to disable certain items in a combobox so I can see that those values/items exists, but aren't selectable.

Mockups or screenshots

Implementation notes or ideas

Extend Combobox options with boolean param: disabled , see:

spectrum-web-components/packages/combobox/src/Combobox.ts

Line 45 in a2b6bea

export type ComboboxOption = {

such as

export type ComboboxOption = {
    value: string;
    itemText: string;
    disabled: boolean;
};

and map that disabled state to related menu-item. Check if selection process will still work and disabled menu item won't be selected when user presses keyUp/keyDown.