fix: [BREAKING] Use default name for components with setup script and nameless compon…

[khalilst]

This PR in the following of issue #806 replaces the anonymous naming with the default component name:

So the following component's stub name will be script-setup-stub:

//filename: ScriptSetup.vue
<script setup>
...
</script>

Also, the same approach works on nameless components.
The test coverage applied for this fix.

[cexbrayat]

Thanks @khalilst for the PR!

LGTM, but I'd like another pair of eyes before merging this.

[cexbrayat]

@lmiller1990 @xanf @afontcu I added you as reviewers, as I don't know if that's too breaking or OK to merge. What do you think?

[khalilst]

@cexbrayat
My pleasure (^_^)
Sure, you need to check it precisely. Just for your consideration, I've applied it in a local test env and everything works fine.

[lmiller1990]

I think this makes sense. Bit of a breaking change for snapshots, but this seems like a overall improvement.