feat(VDatePicker): add prefixed day events handler

[ikushum]

fixes #22428

Description

Emit any events from the day button.

Markup:

<template>
  <v-app>
    <v-container>
      <v-date-picker @click:day="onClickDay" @dblclick:day="onDblClickDay" />
    </v-container>
  </v-app>
</template>

<script setup>
  const onDblClickDay = (e, day) => {
    console.log('dblclick', day)
  }

  const onClickDay = (e, day) => {
    console.log('click', day)
  }
</script>

[KaelWD]

Calendar and datatable use getPrefixedEventHandlers for this which works with any event

vuetify/packages/vuetify/src/components/VDataTable/VDataTableRows.tsx

Line 127 in 29e3f09

{ ...getPrefixedEventHandlers(attrs, ':groupHeader', () => slotProps) }