Add TorchIO tutorial to PyTorch Ecosystem examples

[fepegar]

📚 Documentation

Hi! I have seen that there is a section in the docs for PyTorch Ecosystem examples. I recently added TorchIO + MONAI + PyTorch Lightning to TorchIO. Would you like to add it to the list? I can open a PR if you like.

[edenlightning]

Looks cool! Go for it!