error squiggle when using `%pip` in interactive window

[amunger]

enter %pip install torch into the IW input box

[greazer]

We think this may be due to pylance not realizing that the IW input box is part of a "notebook". The "pylance lsp notebooks" setting was on.

[debonte]

When LSP notebooks are enabled, the _isNotebookCell check in NotebookHandler.handleOpen returns false and therefore we set ipythonMode to false for the interactive window document.

Should we be getting a notebookDocument/didOpen instead of a textDocument/didOpen?