Add support for cleaning of VScode "workspaceStorage"

[pbremondFR]

Hi,

I was recently trying to free up some space, and found out that after some fair bit of using VScode, the workspaceStorage dir was taking a fair bit of useless space. Located in /Users/username/Library/Application Support/Code/User/, it can eat gigabytes worth of disk storage. AFAIK, there are no notable consequences, it's just cache for workspaces, most of which you won't be using any time soon.

A quick Google search reveals that workspaceStorage being so massive is a fairly common problem, and can be solved with a quick and easy rm -rf. Which is why I think it would fit nicely within this toolbox.

I'd make a pull request if I had any meaningful idea of what I'm doing, but since that's not the case, I'll leave it to whoever reads this.

Thanks for your time !

[alexandregv]

Hi, thanks for the suggestion. I added it in 0c486e4.