[Feature Request] Add :text prop to <v-checkbox>

[simionato-mobisec]

Problem to solve

Allow devs to add additional info on what checking the checkbox means, along with its label

Proposed solution

Right now devs can "kinda" achieve that through the :hint prop, but the rendered UI is kinda ugly. What I was thinking was adding text right below the label, with a font-size lower than the label but higher than the hint. Related SASS variables should be provided too

[Bhumi18]

Hi, I'd like to work on this.

[jaskeerat911]

Hey, I've worked on this and opened a PR here: #22924

The implementation adds a description prop and #description slot to VSelectionControl, rendering text below the label with a font-size between the label and hint. SASS variables are included for customisation.