I want to be able to see uncategorized outputs in the VS Code sidebar

Perhaps this also means we should have the `misc` category for potential project inputs whose origin is unknown (no provenance).

Start by locating the VS Code sidebar entry point and the code that categorizes outputs. Determine how outputs with no known category or provenance are currently handled; done means uncategorized outputs appear in the sidebar and the proposed `misc` category behavior is defined and covered by the relevant checks.

Written by the indexing model from the issue text.