chore: allow debugging vscode tests

[benfdking]

sets up the playwright extension correctly in vscode so that playwright tests called from the vscode extension work correctly

To set up

make vscode_settings

[Copilot]

Pull Request Overview

This PR sets up VS Code configuration and test utilities to enable debugging of Playwright tests within the VS Code extension.

• Use path.join with __dirname in utils.ts to locate the VS Code executable path file.
• Extend VS Code settings.json with Python interpreter and terminal environment settings for Playwright.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
vscode/extension/tests/utils.ts	Switch from relative to path.join-based lookup of paths.json
tooling/vscode/settings.json	Add Python venv interpreter path and terminal env overrides