Include vscode settings in artifacts produced by chat session export

[zhichli]

[vs-code-engineering]

Hi @zhichli. As a member of the team, you can help us triage this issue by referring to https://github.com/microsoft/vscode-copilot/wiki/Copilot-Inbox-Tracker and assigning an owner directly.

[amunger]

isn't there already an artifact for that? Why would we need to put it in the chat export?