Add universal bezels/frame

so we currently have iphones as the mockup phones. i think the app would be better if we can like create a universal frame? so its not looking like an iphone but a phone in general?

a universal frame that we can customize like:

• adjusting the width of the bezel

• the color of the bezel/frame

• the rounded corners of the frame

• the opacity

• the stroke

so that universal frame is just like a non-fill box with stroke (functioning like a bezel), with rounded corners. i don’t have a picture but i hope you can imagine it.

p.s ORRRRR we can upload our own phone mockups/frames.