Adding the colab notebooks for the example notebooks

[Showmick119]

No description provided.

[kage08]

Check if the notebooks run on colab. And make any changes if required to run it.
The workflow should be as follows:

1. Copy the notebook to colab
2. Run the code. If you encounter any simple errors like path not found; fix it. If it is more complicated, raise the isse.
3. In the colab choose the save to github option and save to your branch.

Right now, the code is just copied from the examples directory. For example, you may need to change the path of datasets.

[kage08]

Any updates on this @Showmick119 ?