This task covers using [[ https://vuejs.org/guide/components/v-model.html | v-model ]] to allow the parent component to pass in a value for the TextArea, which will be automatically updated when the user changes the value within the `<textarea>` element.
Check out:
- Vue docs on [[ https://vuejs.org/guide/components/v-model.html | v-model ]]
- [[ https://www.vuemastery.com/blog/vue-3-data-down-events-up/ | This article ]] that inspired our solution for managing data passed between parent and child components
### Acceptance criteria
- [] A new `modelValue` prop has been added to the TextArea component (see TextInput.vue for an example)
- [] The TextAreaDemo has been updated to set up a value ref, pass it into the TextArea component, and display the dynamic value (see TextInputDemo for an example)