Add collisions

[Nicolas-Ferre]

Feature
Add automatic calculation of collisions in physics module.

Additional context
To add:

• CollisionGroups: Into<usize> trait to define collision group configuration, contains fn can_collide_with() -> HashMap<Self, Vec<Self>> method
• Collider component to define the collision group of the entity

To modify:

• PhysicsModule has a new generic type that implements CollisionGroups (default: ())

To design:

• OnCollisionWith to easily configure a collision action for a component
• Maybe collision groups can be types instead of values (will probably be easier for OnCollisionWith, but not necessarily for Collider)

Dependencies

• Add rotation #43