Cross platform open file

I'm migrating to using pixi tasks to run various python-related scripts. Most of these generate some output that the user typically wants to open in the default application on their desktop. It would be convenient to have a built-in cross-platform command in the task shell to open files in the desktop.

On macos, this is done with `open path/to/file.txt`, and spaces can be handled with quoting `open "path/to/file with space.txt"`
On windows (powershell), `.\path\to\file.txt` seems to work, and spaces should be quoted like `.\"path\to\file with space.txt"`
I don't have access to any non-apple unix platform at the moment, but a quick google indicates `xdg-open` as the equivalent to macos `open`.