Add `guiEventLoop` to `launch.json` schema

[bersbersbers]

debugpy supports the guiEventLoop option, see microsoft/debugpy#1112, microsoft/debugpy#704, microsoft/debugpy#800, and https://github.com/microsoft/debugpy/blob/ef9a67fe150179ee4df9997f9273723c26687fab/src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_json_debug_options.py#L96C13-L97

However, the JSON schema does not include it, thus reporting

Related: microsoft/vscode-python#22406

[bersbersbers]

May I ask what kind of "community feedback" is needed? Either way, I went ahead and submitted #243 to close this.

[paulacamargo25]

Thanks for your PR @bersbersbers . Sorry it was my fault, the needs community feedback label is for every feature-request, in order to see if we'll implement the issue or not. But since this is a simple change, we can skip that step. I will check the PR. Thanks again.