AtlasTexture

I replaced all the separate sprites of Silhouanna with AtlasTextures. This made it possible to put several sprites together in a single SVG file.

Godot has a "Snap Mode: Auto Slice" which cuts the separate sprites nicely. At least, until you edit the SVG. Then it's better to just re-create the AtlasTexture.

While this should make it possible to change the region of the texture, instead of using different textures, I wasn't successful so be careful.