command to disable mouse modifier?

So far I use alt as mouse modifier.
When I want to disable alt, I switch to cmd.
Maybe I could switch it to fn to disable.

However, sometimes I press those buttons. I need a way to disable the mouse_modifier such as:

yabai -m config mouse_modifier off.

This would allow me to have no accidental keypresses, when my intent is to toggle to not use the mouse modifier in my custom scripts.

Start by tracing how the `mouse_modifier` configuration and `yabai -m config` command are handled. Implement the requested `off` value and verify that scripts can disable the mouse modifier without requiring an alternate key.

Written by the indexing model from the issue text.