You might want to take a look at Ksnip - it uses Qt engine so not sure if it will look the same on GnomeDE which Zorin uses - it even mimics Snipping Tool with Icon and similar options:
if you are really after a Windows 10 look then you might wish to consider installing 'kde-standard' as an option to login to on Zorin 18.1 Core. The hard way:
It also has a delayed timer which I don't think Snipping Tool has - useful if taking a screenshot with a menu open.