Disable cloud sync for .pixi folder

[3f6a]

Problem description

The .pixi or .venv folder of a project contains the virtual environment, which is usually quite large. I think pixi could follow astral-sh/rye#585 here, thus disabling cloud syncing (at least for iCloud, Dropbox) of these folders. That would be helpful in case some of us want to work with a Python project in a cloud folder.

[baszalmstra]

Moved this to a discussion in the ideas section. I think this is a good idea but Im not sure when we'll get to it.!