76 add google colab notebook demo

[daavoo]

• Added demo/notebook.ipynb

  Test from this branch:
  https://colab.research.google.com/github/mozilla-ai/document-to-podcast/blob/76-add-google-colab-notebook-demo/demo/notebook.ipynb

• Updated setup instructions

  Update to use https://squidfunk.github.io/mkdocs-material/reference/content-tabs/.
  Check the docs updates:

  mkdocs serve
  

[stefanfrench]

@daavoo - Tested this and it worked well on the T4 GPU.

The addition of the content tabs in the Docs looks great!

One minor change I think we should implement - in both the Docs and the Colab Notebook, I think we should be explicit about the user ensuring they change the Colab runtime to a GPU - as it defaults to a CPU, and if they dont change it, it will break. Something like:
"This notebook requires a GPU runtime to function correctly. Using a CPU runtime will result in errors.

How to Switch to GPU:
1. Go to Runtime > Change runtime type in the top menu.
2. Set Hardware accelerator to GPU.
3. Click Save.
"

[daavoo]

One minor change I think we should implement - in both the Docs and the Colab Notebook, I think we should be explicit about the user ensuring they change the Colab runtime to a GPU - as it defaults to a CPU, and if they dont change it, it will break. Something like: "This notebook requires a GPU runtime to function correctly. Using a CPU runtime will result in errors.

@stefanfrench I updated the notebook adding a text paragraph and also a python code that will crash if the GPU is not enabled:

I think it is enough to have that in the notebook and something in the docs would be kind of redundant, but I can also update the docs if you think is a blocker

[stefanfrench]

@daavoo - thanks for adding the GPU check, works great! Approved.