No parameter path for animation nodes

**4.0.2**

**Issue description:** For animation nodes such as AnimationNodeTimeScale, there is no parameters listed inside the docs or inside the editor that I could find. To know I had to reference "scale" to change the timescale, I had to search on Reddit. This doesn't apply just to the timescale node, but other nodes as well. I think it would just be more convenient if there was an easier place to reference these paths, as it is not directly stated you have to change "scale", or "blend_amount" on other nodes, etc.

**https://docs.godotengine.org/en/stable/classes/class_animationnodetimescale.html**
https://docs.godotengine.org/en/stable/tutorials/animation/animation_tree.html

The tutorial for animationtrees also does not reference that you need to set "scale"