Ensure Newline at EOF is Consistently Rendered and Fix JSON Formatting in VS Code

The existing JSON file had a newline at the end of the file (EOF), but it is not visible or rendered properly in VS Code and there are unsupported markers in the file.

Inspect the existing JSON file in VS Code and reproduce how the end-of-file newline is rendered, including the unsupported markers mentioned in the issue. Done means the file is validly formatted, the newline is consistently visible or rendered, and the unsupported markers are no longer present.

Written by the indexing model from the issue text.