Adding Jupyter Book content for v0.4 release

[asemposki]

#109 Merging the Jupyter Book pedagogical content, largely based on the JOSS article, to the package for v0.4. This will help users become familiar with the content behind the code, and to know which method to choose for themselves. This will also make the Jupyter Book more useful than just a place for the tutorial notebooks to live. This can be expanded in future releases.

Pending tasks for @asemposki:

• Reduce output from bilby if possible
• Full review

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.60%. Comparing base (49e9fbd) to head (3ae7052).
Report is 69 commits behind head on main.

Additional details and impacted files

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  Coverage   66.60%   66.60%           
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  Misses        521      521           

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[asemposki]

@jared321 I attempted tox build on my machine, and the Book is failing again in the Trees_BMM_2D notebook, citing a RunTime error. I have not made any changes to that notebook, or pushed anything, so I am unsure of where this is coming from.

[asemposki]

I also just added the option for Colab to run these notebooks. I remember using it for the BAND camp and I don't like it as much as Codespaces, but Colab is the only one of the two that currently has a direct launch option from the Book, and I am pretty sure that the only way John could get people to run Trees in the Cloud was on Colab. I will include a Codespace introduction in the book though, too, so people know how to navigate there. That will probably just be the instructions on the README of the whole repo.

[asemposki]

I will merge this in today, if all checks are passing, as everything looks good and we've both checked it over a few times as we've made progress.