Add the Bent Normal Map baking

[Toskyv]

Pre-Flight checklist

• [x] Did you check to see if this issue already exists?
• [x] This is a single feature request. (Do not put multiple feature requests in one issue)

Describe The Feature Request Below

Bent Normal Map is a type of normal map used for game engines.

• here the showcase of this normal map : https://dev.epicgames.com/documentation/en-us/unreal-engine/bent-normal-maps-in-unreal-engine?application_version=5.4

• this link contain a OSL script to bake Bent Normal Map >- https://blender.stackexchange.com/questions/157079/how-do-i-bake-a-bent-normal-map-in-blender

[jcostello]

This will be a nice adition

[Antekariel]

This is needed for multiple game dev pipeline, prior to ArmorPaint supporting bent normal baking I was using the blender script mentioned above, its implemented in unreal, unity and even in godot so would be very nice to see it added in ucupaint !