Feature request: Rename files with a decent name if two files have the same name.

[Stéphane Archer]

Dear Gnu Coreutils community,

I'm using the shell every day but there is one thing that terribly annoys
me.
When moving files, if two files have the same name, you can overwrite it
with the default behavior, not move the file with -n or choose between the
two with -i, from my understanding the is no way to tell mv to rename the
file to avoid the overwrite with a decent name like img_2.jpg for img.jpg

Can you add this feature to mv?

-- 
Best Regards,

Stephane Archer