Image measurement!

I implemented another system where you can import an image, then draw a line and say how long that line is. Then the whole image stuff will be scaled proportional to that and then you can measure it and stuff!

I also added a bunch of other small things like improving the scale library backend, adding camera controls, etc.

It’s kind of barebones rn and this took way too long anyway, I’m going to add some menus/interfaces to tie everything together and some other QoL next ig.

Here’s a picture of a maze where I selected the big horizontal line and defined it as 170mm, and there’s some measurements on it.