feat(VFileUpload): add new component

[johnleider]

Motivation and Context

closes #8812

Markup:

<template>
  <v-app>
    <div class="ma-4 pa-4" style="max-width: 700px;">
      <v-file-upload
        v-model="model"
        label="Upload logo"
        name="metadata[images][logo]"
        multiple
        show-size
      >
        <!-- <template #browse="{ props: browseProps }">
          <v-btn v-bind="browseProps" color="purple" size="small" />
        </template> -->

        <template #item="{ props: itemProps }">
          <v-file-upload-item v-bind="itemProps" lines="one" nav>
            <template #prepend>
              <v-avatar size="32" rounded />
            </template>

            <template #clear="{ props: clearProps }">
              <v-btn color="primary" v-bind="clearProps" />
            </template>
          </v-file-upload-item>
        </template>
      </v-file-upload>
      <pre>{{ JSON.stringify(file, null, 2) }}</pre>
      <v-file-upload density="comfortable" />
      <v-file-upload density="compact" />
    </div>
  </v-app>
</template>

<script setup>
  import { ref, watchEffect } from 'vue'

  const model = ref(null)
  const file = ref(null)
</script>