git: Add VSCode working dir to .gitignore

[JohannMG]

Ignores additions and changes to any configurations in VSCode.

Description

Adds .vscode/*to the .gitignore file.

Motivation and Context

Myself and other users don't want to see this in staging because they should never be committed.

How Has This Been Tested?

Files in .vscode/ no longer populate git staging.

Types of changes

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.

[WizardCM]

This could probably just be vscode/ instead of vscode/*

I personally approve of this change as I use VS Code to browse the repo due to its superior search.

[JohannMG]

@WizardCM true; updated.