feat(VRating): port to v3

[nekosaur]

Description

Updated v-rating for v3.

• fixes [Bug Report] Ratings props.isHovered isn't working #12629

Motivation and Context

v3

Breaking changes

• Added tag prop
• Added item-labels, item-label-position props and item-label slot ([Feature Request] add label prop to v-rating #5167)
• Renamed icon-label to item-aria-label
• Renamed rating.ariaLabel.icon to rating.ariaLabel.item entry in localization files
• Removed dense prop, added density prop
• Removed individual size props, added size prop
• item slot props have changed

How Has This Been Tested?

Markup:

<template>
  <v-app>
    <v-rating
      v-model="rating"
      background-color="purple-lighten-3"
      color="purple"
      size="large"
      hover
      length="10"
    ></v-rating>
    {{ rating }}
  </v-app>
</template>

<script>
  import { ref } from 'vue'

  export default {
    name: 'Playground',
    setup () {
      const rating = ref()

      return { rating }
    },
  }
</script>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)

[johnleider]

Everything looks good except for the hover effects (which may be a v-btn thing), they feel delayed/laggy.

[johnleider]

Requesting Final comments from @vuetifyjs/core-team

[johnleider]

Components that have a default color should define it as a sass variable with the prop being used to override that.

v-btn default icon styles changed, they now have elevation that should be removed.