add basic phycis support for primitives

[macrozone]

you can now add phycisbody to your 3d objects:

<ARKit.Sphere
      transition={{ duration: 0.1 }}
      position={{ x: 1, y: 2, z: 1 }}
      shape={{ radius: 0.1 }}
      physicsBody={{
        type: ARKit.PhysicsBodyType.Dynamic,
        mass: 1
      }}
    />
    <ARKit.Plane
      eulerAngles={{ x: Math.PI / 2 }}
      position={{ x: 0, y: 0, z: 0 }}
      physicsBody={{
        type: ARKit.PhysicsBodyType.Kinematic
      }}
  shape={{
        width: 100,
        height: 100
      }}
/>

This works for primitives. It will use the same shape for the physicsBody.

For models, Groups or if you want to customize physicsShape, you can specify the shape:

  <ARKit.Sphere
      transition={{ duration: 0.1 }}
      position={{ x: 1, y: 2, z: 1 }}
      shape={{ radius: 0.1 }}
      physicsBody={{
        type: ARKit.PhysicsBodyType.Dynamic,
        shape: {
          type: 'sphere', // any of "sphere", "box", "cylinder", "plane", etc.
          radius: 0.2 // this makes the sphere bigger than it visual representation is
        }
      }}
    />

for a Group:

  <ARKit.Group
      position={{ x: 1, y: 2, z: 0 }}
      shape={{ radius: 0.1 }}
      physicsBody={{
        type: ARKit.PhysicsBodyType.Dynamic,
        shape: {
          type: 'cylinder',
          radius: 0.1,
          height: 0.4
        }
      }}
    >
      <ARKit.Sphere
        position={{ x: 0, y: -0.1, z: 0 }}
        shape={{ radius: 0.1 }}
      />
      <ARKit.Sphere position={{ x: 0, y: 0.1, z: 0 }} shape={{ radius: 0.1 }} />
    </ARKit.Group>

If you want to debug the physics shape, set debug to arView:

<ARView debug .../>

i need to figure out, how to get updates to the position, rotation, etc, which will be needed, if you need to sync back your nodes to state / redux

[baransu]

Amazing work with the whole library. I was trying to test this PR and encountered the problem with no input file. It turned out to be problem in ios/RCTARKit.xcodeproj/project.pbxproj.

- B12E5F302070241D00D423F4 /* Switcher.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = Switcher.m; path = "../../../../../../panter/archilogic/react-native-arkit/ios/Switcher.m"; sourceTree = "<group>"; };
+ B12E5F302070241D00D423F4 /* Switcher.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = Switcher.m; sourceTree = "<group>"; };

Besides that everything worked like a charm ❤️

[macrozone]

@baransu hm, weird have to check that out. Thx for your feedback <3