Add VS Code editor group navigation commands

[xai]

What it does

Fixes #13428 by adding the required workbench navigation actions.

How to test

1. Install https://open-vsx.org/extension/vscodevim/vim
2. Open multiple files in split-windows
3. Try to navigate between them with vim bindings, i.e., ctrl+w+{h,j,k,l} to move to the window {left,down,up,right} of the currently active one.

Without the patch, nothing will happen.
With the patch, the active window should be switched.

Follow-ups

Breaking changes

• This PR introduces breaking changes and requires careful review. If yes, the breaking changes section in the changelog has been updated.

Attribution

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines
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Reminder for reviewers

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