Feature: replace .vscode directory with a .code-workspace file

[andy-blum]

The Problem/Issue/Bug

The .vscode directory stores files that can be used to configure the editor's settings, debugger, et cetera, but the same thing and more can be accomplished in a .code-workspace file. Additionally, the code-workspace file allows users to create "multi-root workspaces" which can make navigating code easier when applications are spread across large numbers of files.

How this PR Solves The Problem

This PR moves the existing launch.json and settings.json files into the code workspace and sets three workspace folders:

• DrupalPod (/workspace/DrupalPod/)
• Drupal Core (/workspace/DrupalPod/repos/drupal/)
• Web Root (/workspace/DrupalPod/web)

Setting the folders up this way let us remove the distractions of other files/folders when we want to focus on work in the webroot or drupal git repo.

Manual Testing Instructions

Open the deploy preview, which should automatically set the editor's workspace to use the code-workspace file.

Related Issue Link(s)

None

Release/Deployment notes

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