Support `ModelModifiers` for components

[hywax]

Package

v4.x

Description

Add the addition of `Model Modifiers' for components:

• Select
• SelectMenu
• InputMenu

This feature is sorely lacking.

An example from a working draft (and there are many such lines):

<USelect
  :model-value="infoForm.priority ?? undefined"
  :items="segmentPriorityItems"
  @update:model-value="infoForm.priority = $event"
/>

But I want to

<USelect
   v-model.optional="infoForm.priority"
   :items="segmentPriorityItems"
/>

I tried to add it myself, but it didn't work out the first time.

Additional context

No response