feat: consider using binary size units by default

[matklad]

By default, eza's M is 1000KB, not 1024KiB. This probably doesn't matter for the majority of the cases, but it is extremely confusing if you do need to know precise size of the file. I can't back that up, but my gut feeling is that 9 out of 10 people upon seeing

.rwxr-xr-x@ 132M matklad 30 Sep 14:34  tigerbeetle

would interpret that as 132MiB, not as 132MB. I definitely was mightily confused over this today!