To use these files import the Vue.js User Defined Language .xml file for syntax highlighting. The keyword list for AutoCompletion is to be copied to the plugins\API directory, vue.xml.
I am learning here, so some of these are far from perfect, and I am sure will need correcting as I can do it.
And, I think I'm the first to create one of these for Vue.js (even if it is not the greatest.) So can I say, "First"?