Update notebooks

[rogerkuou]

1. Publish the zarr data in the [example] to Figshare
2. Use the second part for STMExample for a stand alone notebook.
3. README for example directory on setup.
4. Another TUDelft dedicated version for large scale data

[rogerkuou]

Example Notbook added to https://github.com/MotionbyLearning/stmtools/blob/main/docs/notebooks/demo_stm.ipynb