[feat request]: Allowing alt-click

[Parsifa1]

ref RamonUnch/AltSnap#126 (comment)

thanks for this great project!

i'm thinking if there is an approch to make this happen:

using ⌘ as mod-key, when pressing command with normal left-click, it will just work like ⌘-click.
if it click with drag, then then windows will be dragged.

i know nothing about swift, so maybe i can't do something helpful, but i can give a favor in testing things if you decide to make this happen!

Thank fo this project once again!