Missing Variation description

[vernaillen]

I noticed that the (optional) variation description is not shown on the product page.

The field seems to be missing in the VariableProduct fragment as well.

I was able to override the AttributeSelections component to add this field, which you can see in this commit:
vernaillen@0a31f39
I added the variations prop (line 5), a new getSelectedDescription function (lines 21 to 29) and the html to display it (lines 149 to 152)

Maybe I can make a PR to add this to WooNuxt?
This update is working in my particular use case, but I might be overlooking something