Keyword as Workflow Configuration

From https://www.alfredforum.com/topic/19561-vscodediff/#comment-101794

There’s another one you can make in that vein: Instead of three Keyword Inputs, have a single one. In the Workflow’s Configuration, add another text field for the keyword and use the variable as the value in the Kewyord Input. The documentation explains how that’s done. Here’s the workflow with the changes (I’d submit a PR, but the contents aren’t in the GitHub repo). I’ve also made made a small tweak to call the current configuration “VSCode CLI” and quoted the vscode variable (otherwise spaces in the path would trip up your code).