Open `https://devdocs.io/` URLs in the installed PWA

# Feature request

With the DevDocs PWA (progressive web app) installed when opening a DevDocs URL - for example in Windows: `start chrome https://devdocs.io/python~3.13/library/copy` open the documentation inside the PWA window. This would be very useful for example when using the devdocs extension in VS Code.

Currently the documentation opens as a usual web page - i.e. in Google Chrome as a new tab. Chrome only shows a button "Open in app" and only after clicking it the web page opens in the installed PWA.

Start by tracing how an installed DevDocs PWA handles navigation for https://devdocs.io/ URLs, using the example Python documentation URL and the Windows Chrome launch described in the issue. Done means opening such a URL goes directly to the installed PWA window instead of a regular Chrome tab, including the VS Code extension use case.

Written by the indexing model from the issue text.