What problem does this feature solve?

In script setup, if we want to declare some options like name or inheritAttrs, we need to add a new script block without setup, how about place options in defineOptions({ name: 'MyComponent' }), so we still use a single setup script, and no need to add extra script tag.

What does the proposed API look like?

Just like defineProps and defineEmits, offer an api named defineOptions

<script setup>
defineOptions({
  name: 'MyComponent',
  inheritAttrs: false
})
</script>

Duplicate of #5218， see RFC