Add colab

[franz101]

Would be helpful to have a colab for prompting with medprompt on a custom question and answer pair

[Harsha-Nori]

Great idea to have an interactive interface for playing with the prompts! I think a notebook is a nice idea. Will leave this open and update when we have a chance to pull something like this together.

[Akashpaila]

On what kind of custom questions and answers does the model need to train