feat(compiler-sfc): supports reference a variable in withDefaults

[sxzz]

• Support

import defaults from './some'
withDefaults(defineProps<{ foo: string }>(), defaults)

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Existing plugin: https://github.com/Zolyn/vite-plugin-vue-with-defaults-imports
Inspired by @Zolyn

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[yyx990803]

We are deprecating withDefaults() in favor of reactive props destructure, so let's avoid complicating the codebase for it.

[yyx990803]

Landed in fe61944