Place a file in the selected folder when adding via keyboard shortcut

[loreggia]

Adding a class or interface using keyboard shortcuts bound to the respective actions should place the newly created file in the currently selected folder in the explorer window.

Currently it always places files created via keyboard shortcuts in the root folder, which in my opinion is almost never the desired behaviour.

I'm used to using the ReSharper shortcuts in VS (Alt+Ins, C / Alt+Ins, I) so it would be nice if this worked similarly.

[loreggia]

Ok, I was looking into this myself a bit and it seems the VS Code API does not expose the currently selected files/folders anywhere (at least when using shortcuts), so it seems that this wouldn't be possible until MS implements that.
microsoft/vscode#3553
microsoft/vscode#117820