Adding zoom options to Still preview

[z16th]

❗ EDIT: This has been implemented in https://github.com/remotion-dev/remotion/releases/tag/v3.2.16

I've been using remotion mostly to create images

One of the things that are missing is the ability to zoom in and zoom out in smoother intervals when using Stills.
Ideally, I was picturing it like a scrollable/zoomable/draggable canvas like in image editing/design software, but just being able to scroll in both axes should do the trick for me.

I dove into the code and tried to add it myself but I guess I got lost in the complexity of the project and how things relate to each other. I made a draft in case you want to give it a look #1286