First of all thank you very much for this awesome package. Your package is one of many reasons why I moved from Sublimetext to VSCode (don’t mean to start a war here though).
I have been fiddling around a bit, and have been trying various methods to add WordPress intellisense. My preference has always been to just add the plugin/theme directory to vscode workspace. But in order to get intellisense of WordPress core functions, I had to add WordPress source in the workspace too. Not a great fan of this.
Then I came across this and since I use composer anyway, getting intellisense was a breeze.
I would’ve wanted to contribute to some doc, but since I didn’t find any, I am opening an issue explaining the method and I leave it upto you to do what-so-ever you wish.