v0.3.1

✅ Removed Overlapping of Canvas (Canvas is now exactly the image size, so there is no more "downsizing" of the image)
✅ Colors are now configurable. The "Presets" now serve as slots. When I pick a custom color the slots are overridden.
✅ The zoom is now capped at .75 and there is no weird flipping back to 1x
✅ The bug that caused the canvasData to be lost when the browser window got resized is now fixed
✅ There is now a short "Tutorial" text in the top right menu. This is just stating Joe's text.
✅ The OpenAI Generation Policy is now also included in the top-right, with a reference to the actual and up-to-date requirements by OpenAI.