New 'before you begin' PR with Parris' updates, plus edits

[nrichers]

Internal Notes for Reviewers

This PR replaces #108 which has some issues with deleting files we still need. This PR basically consists of only the following files, checked out from the before_you_begin branch:

• site/notebooks/before_you_begin.ipynb
• site/notebooks/Quickstart_Customer Churn_full_suite copy.ipynb

I added Co-authored-by: Parris Mook-Sang-Forbes <parris@validmind.ai> to make sure Parris gets credit for the original work.

Outstanding to-dos:

• move before-you-begin template into templates/ folder to avoid externalizing it
• make sure product names are proper nouns
• add some info about why creating a documentation project matters
• don't send people to Support
• reduce the number of callouts
• hardcode help links in the notebook to make sure they work from anywhere
• update the authoritative source of the Quickstart notebook once we have approval from Andres

We also need to update all the other notebooks we plan to use this with in some follow-on pull requests.

Current output

External Release Notes

We added some template examples that we can apply to our Jupyter notebooks to make the prerequisites easier to understand. The template adds a "Before you begin" section that describes the prerequisites.

[nrichers]

@sydneysugar are you able to address Andres' last comment and then roll this out to the different notebooks we embed in our docs? I will provide a list of the canonical source for each notebook (two in gdrive, the rest in the validmind-python repo). Once the notebooks are updated, we can run make get-source, update the rendered docs site and and republish it.

This is the section to remove:

[nrichers]

Canonical notebook source info for @sydneysugar. (The fact that we now have 11 of these notebooks just shows how important they have become to our docs.)

GitHub (update in validmind-python, then run make get-source)

• notebooks/how_to/run_a_template.ipynb
• notebooks/external_test_providers_demo.ipynb
• notebooks/how_to/implementing_custom_tests.ipynb
• notebooks/how_to/explore_test_suites_test_plans_and_tests.ipynb
• notebooks/how_to/run_a_test.ipynb
• notebooks/how_to/run_a_test_plan.ipynb
• notebooks/how_to/run_a_test_suite.ipynb
• notebooks/time_series/tutorial_time_series_forecasting.ipynb
• notebooks/nlp/nlp_sentiment_analysis_demo.ipynb

Google Drive (edit in Google Colab and then copy into the documentation repo)

• notebooks/Quickstart_Customer Churn_full_suite.ipynb
• notebooks/Introduction_Customer_Churn.ipynb

[nrichers]

@cachafla if you are OK with us merging this template, can you approve? Sydney has removed the section "Initialize the Python environment" as requested.

[cachafla]

🙌