This updates adds a button that you can use to import the original PKL animation file created by official 4d Humans code.
with this option, you can run 4d humans on google colab and use the result PKL file on the addon from smoothing or to import the animation in blender.
Google Colab Link of 4D Humans: https://colab.research.google.com/drive/1Ex4gE5v1bPR3evfhtG7sDHxQGsWwNwby?usp=sharing