Feature: Implement features for layer previews

[KR155E]

The isDrawingEnabled parameter appears to not be working, because despite setting it, I can still edit the image.

Use cases I have for a (lightweight) readonly variant are:

1. A navigator component which works as a mini map or sorts and simplifies working with larger images
2. Rendering layer previews
3. Or more generally speaking, for preview purposes, rendering a static image from data without having to export a PNG