feat(VCardItem): add prepend and append click handlers

[blalan05]

Markup

<template>
  <v-app>
    <v-main>
      <v-card width="400px">
        <v-card-item @click:prepend="doOne()" @click:append="doTwo()">
          <template #prepend>
            <v-sheet :color="one ? 'primary': null">Prepend</v-sheet>
          </template>
          <template #default>
            Default
          </template>
          <template #append>
            <v-sheet :color="two ? 'primary': null">Append</v-sheet>
          </template>
        </v-card-item>
      </v-card>
    </v-main>
  </v-app>
</template>

<script setup>
  import { ref } from 'vue'
  const one = ref(false)
  const doOne = () => one.value = !one.value

  const two = ref(false)
  const doTwo = () => two.value = !two.value

</script>