fix(install): warn about vscode copilot agent path setting (#185)

[gbpnkans]

Fixes #185 by adding a post-install warning about the chat.agentFilesLocations setting for VS Code Copilot agents.

[msitarzewski]

Hey @gbpnkans — thanks for this. We're working through the right fix for the copilot install path in a Discussion: #200

Would love your input there so we can align on the approach before merging a solution.

[msitarzewski]

Thanks for this @gbpnkans — the warning placement in the summary box was a nice touch. We're going to go with #216 which bundles the warning along with a --path flag for non-standard installs, covering this more broadly. Closing this one but appreciate the contribution!