Add some notes about importing meshes for use with SoftBody3D

[simpkins]

This mentions that users may want to change the default LOD generation settings when importing meshes for use with SoftBody3D.

See godotengine/godot#108025

• Production edit: See also SoftBody3D: document behavior with regards to LODs godot#108064.

[skyace65]

I know the page as is doesn't have the best formatting but you can't have endlessly long lines in the docs. You also had two spaces after periods for some reason, and I've removed a comma that doesn't flow well in my suggested change.

[skyace65]

Suggested change

	When importing a mesh for use with ``SoftBody3D``, you may also want to change the default LOD generation options. The default import settings will produce an LOD that merges adjacent faces that are nearly flat with respect to each other, even at very close render distances. This works well for static meshes, but is often undesirable for use with ``SoftBody3D``, if you want these faces to be able to bend and move with respect to each other, instead of being rendered as a single plane.
	When importing a mesh for use with ``SoftBody3D``, you may also want to change the
	default LOD generation options. The default import settings will produce an LOD
	that merges adjacent faces that are nearly flat with respect to each other, even at
	very close render distances. This works well for static meshes, but is often
	undesirable for use with ``SoftBody3D`` if you want these faces to be able to bend
	and move with respect to each other, instead of being rendered as a single plane.

[simpkins]

Sure, your suggestion sounds good to me. I had assumed that non-wrapping was the convention based on the other lines in this file and the class reference, but wrapping definitely seems preferable. I'll also tweak this slightly to try and better comply with the writing guidelines from the contributing guide.

[skyace65]

Not all of the files are as good with this as they should be. And the class reference is an exception to this