[microsoft/vscode] "Ran Playwright code" Input code is syntax highlighted as if it were JSON, but it's JavaScript

### ROOT CAUSE The issue arises because VS Code's language server incorrectly identifies JavaScript code as JSON, likely due to the file extension being `.json` instead of `.js`. This misclassification causes JSON syntax highlighting to be applied to JavaScript code, leading to incorrect highlighting and potential errors. ### CODE FIX Change the file extension from `.json` to `.js` to ensure proper language identification and syntax highlighting by VS Code's language server. ```json // No code change needed, ensure the file has a .js extension // Example: Rename 'config.json' to 'config.js' ```