Implement sample app using PoseNet

[jsharp83]

https://www.tensorflow.org/lite/models/pose_estimation/overview

https://github.com/tensorflow/examples/tree/master/lite/examples/posenet/ios

[jsharp83]

Pose Animator

https://blog.tensorflow.org/2020/05/pose-animator-open-source-tool-to-bring-svg-characters-to-life.html

https://github.com/yemount/pose-animator