message: docs: add imports
diff: @@ -7,6 +7,8 @@ The introduction of `setup` and Vue's [Composition API](https://v3.vuejs.org/gui
  Because we don't have access to `this` inside of `setup`, we cannot directly access `this.$router` or `this.$route` anymore. Instead we use the `useRouter` function:
  ```js
  +import { useRouter, useRoute } from 'vue-router'
  +
  export default {
  setup() {
  const router = useRouter()
  @@ -27,6 +29,8 @@ export default {
  The `route` object is a reactive object, so any of its properties can be watched and you should **avoid watching the whole `route`** object:
  ```js
  +import { useRoute } from 'vue-router'
  +
  export default {
  setup() {
  const route = useRoute()
  