Crazy idea: Could Ukraine conspire with the West to "declare war" against a Nato country, so that Nato could go into Ukraine without officially attacking Russia?

It would go something like this:
Ukraine “declares war” against, for example, Poland (with Poland’s and Nato’s full cooperation).
Maybe send in some token tanks across the border.
Poland then triggers Article 5, and Nato “invades” Ukraine, stationing forces around major cities, protecting infrastructure and population centres from Russian cruise missiles, and lining up on the Belarusian the Russian border currently under Ukrainian control, to prevent an incursion from those directions. This would give Ukrainian forces the ability to focus entirely on the Russian front, without having to worry about being pincered by Russia or Belarus.