[FEATURE] I want to remove border radius from all windows

[JoelScarinius]

Is your feature request related to a problem? Please describe.
I want the border radius for all gtk applications to be 0. For example evince (Document viewer) has a small border radius which is annoying because I am used to fill the whole screen which each tile. (Using Sway on Ubuntu)

Describe the solution you'd like
No border radius on all windows.

Describe alternatives you've considered
Easy way to activate or remove, maybe one variable controlling this.

Additional context