feat(VBtnGroup/VBottomNavigation): Add baseColor prop

[yuwu9145]

fixes #17042

Description

Copy "baseColor" logic from VListItem

Markup:

<template>
  <v-card class="mx-auto" max-width="300">
    <v-list :items="items" color="green" base-color="red"></v-list>
  </v-card>
  <br>
  <br>
  <br>
  <v-card class="mx-auto" max-width="300">
    <v-btn-toggle color="green" :base-color="baseColor" v-model="toggle_exclusive">
      <v-btn>
        <v-icon>mdi-format-align-left</v-icon>
      </v-btn>

      <v-btn>
        <v-icon>mdi-format-align-center</v-icon>
      </v-btn>

      <v-btn>
        <v-icon>mdi-format-align-right</v-icon>
      </v-btn>

      <v-btn>
        <v-icon>mdi-format-align-justify</v-icon>
      </v-btn>
    </v-btn-toggle>
    
  </v-card>
  <v-btn
    @click="() => baseColor = 'yellow'"
  >
    change basecolor to yellow
  </v-btn>
</template>

<script>
  export default {
    data: () => ({
      toggle_exclusive: 2,
      baseColor: 'red',
      items: [
        {
          title: 'Item #1',
          value: 1,
        },
        {
          title: 'Item #2',
          value: 2,
        },
        {
          title: 'Item #3',
          value: 3,
        },
      ],
    }),
  }
</script>

[MajesticPotatoe]

is it a bug fix or a feature?

[yuwu9145]

is it a bug fix or a feature?

Small new feature, I will base branch it to dev