Add option to disable sending usage telemetry

[hackel]

Describe the feature or problem you'd like to solve

As a user, I want to be able to control what information I share with third parties.

Proposed solution

Add a boolean enableTelemetry flag to settings.json to disable sending usage telemetry. This mirrors the existing flag in the Jetbrains GitHub Copilot plugin.

While I believe all such telemetry must be explicitly opt-in by default, at least adding the option would be a great first start, even if you don't expose it in the UI.

Example prompts or workflows

No response

Additional context

No response

[andyfeller]

@hackel : I believe the settings you're interested in can be found on the Copilot Settings page as explained in Managing GitHub Copilot policies as an individual subscriber.

[hackel]

@andyfeller thanks for the link. I'm actually referring to the usage metrics sent by Copilot CLI itself, not model training. I'm currently on an enterprise license, so that isn't a concern.