Fix vscode-eslint settings

[SamB]

I ran into a few papercuts with peggy.code-workspace:

1. vscode-eslint wasn't using the settings from eslint.config.js, so I fixed that
2. the workspace had vscode-eslint set as the default formatter for all languages, so I fixed that
3. peggy.code-workspace was indented with tabs, but .editorconfig said to use spaces for all files, so I reindented the file

Then, of course, I painstakingly committed each of those changes in the opposite order.

[hildjj]

Shoot, I should have run two more checks before I landed this. @SamB, can you please send another PR that includes:

• Ensure you are in the AUTHORS file
• Add a CHANGELOG entry

[hildjj]

@SamB I added you to the AUHTORS file in preparation for 4.0.3. Feel free to send me another pull request with any preferred naming or contact info.