[Bug] qmk setup can't handle spaces in home path

Describe the Bug

I was just upgrading to the external userspace and had to update my qmk config because I couldn't get the userspace-add command to work.

I then saw this line in my config: user.qmk_home=S:ProjectsKeyboardsQMK

This was really weird and I tried to run qmk setup again but it set it to the above so I had to set it manually. I had to set the path sorrounded with "" to set it to: user.qmk_home=S:/Projects/Keyboards/QMK Firmware/qmk_firmware

After setting it manually it finally works. I would expect that qmk setup would set the path correctly even if it contains a space. Sadly I don't know enough about the build code to do any PR for it :)

Keyboard Used

No response

Link to product page (if applicable)

No response

Operating System

Windows

qmk doctor Output

No response

Is AutoHotKey / Karabiner installed

• AutoHotKey (Windows)
• Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response