Change capsule to basic shapes. Add basic implementation for conveyer belt. Make static bodies be kinematic instead.

[Ughuuu]

• Change capsule to basic shapes. This helps the test_body_move but makes everything about 1.33x slower(we can see later to only make the shapes like this for static bodies).
• Add basic implementation for conveyer belt. (a little bit of boiler plate that we can use later).
• Make static bodies be kinematic instead. (this is needed also for Godot so we are able to return the velocity correctly. Also, rapier handles moving static shapes better if they are kinematic instead of static).
• Update how we construct aabb's to keep into account position of shapes also(we still need to update based on rotation, for that I think we need to recreate the aabb completely. Also scaling, etc).
• remove the SMALL_MARGIN_FOR_NUMERICAL_ERRORS as it seems to only be relevant for capsule that now works.
• Move an error related to if a shape is not in a space when set_transform is called. We need to make sure also that updates are applied correctly for everything even if things aren't in simulation(big change, todo)

[Ughuuu]

Great hack with the capsule solves the capsule's problems, everything works perfectly.

However, I noticed a regression since my last review in the same place as last time, with a circle, polygon or square.

There is a jitter:

jitter.mov

Was testing a bunch of stuff and reenabled by mistake the part that causes the jitter.

[fabriceci]

Thanks!