Remove whitespaces from empty lines when pressing enter

[failable]

Check for existing issues

• Completed

Describe the feature

Zed:

def test():
    a = 1
    |                      <----cursor here, press enter

def test():
    a = 1
    (4 whitespaces are kept on this line)
    |                      <----cursor here, now

This is inconvenient when sometimes one try to run workspace::SaveWithoutFormat to avoid formatting but lots of the whitespaces are kept.

In Emacs and VSCode, those whitespaces are removed without needing to save the file or running formatter.

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[probably-neb]

Hmm this seems tricky. Can think of lots of times this would actually be the desired behavior. Going to move this to discussions so we can keep the conversation going and think about how or if to implement this