Clarify usage of FREEZE_MODE in RigidBodies

[tnlen]

• Production edit: See classes/class_rigidbody3d godot-docs-user-notes#311 (comment).

Your Godot version:
4.4

Issue description:
RigidBody2D/3D's documentation on freeze_mode FREEZE_MODE_STATIC states:

It can be only moved by user code and doesn't collide with other bodies along its path.

This doesn't specify where the body may be moved (process vs. physics_process). My assumption now is, that in STATIC it can be moved wherever seems appropriate (e.g. I rotate the body directly using _input)

Then in FREEZE_MODE_KINEMATIC it says:

Similar to FREEZE_MODE_STATIC, but collides with other bodies along its path when moved.

I got confused here for quite some time, because I tried to move a body in _input while frozen in FREEZE_MODE_KINEMATIC.

It now seems logical to me, that it should be moved in _physics_process when in FREEZE_MODE_KINEMATIC, because how could it collide otherwise, but I feel that this should be pointed out in the docs to avoid confusion.
Additionally I think STATIC should say that the restriction on moving the body only be applying forces does no longer apply when frozen in this mode, if my assumption is correct on this.

URL to the documentation page (if already existing):
https://docs.godotengine.org/en/4.4/classes/class_rigidbody3d.html#enumerations

minimal_example.zip

[tnlen]

This is my first contribution, so please feel free to give feedback.
I might also try to create a pr myself if this issue seems valid to you.