Enable collision events for kinematic bodies

[jcornaz]

Discussed in #137

rapier disable collision events for kinematic bodies by default (see: https://rapier.rs/docs/user_guides/bevy_plugin/colliders/#active-collision-types).

This makes sense for rapier, but as heron aims to proveide a simpler user-experience, it should override that default and enable the collision events for all type of bodies.