Add beginning of garden lattice chapter

[d33bs]

Description

Adds beginning of garden lattice chapter with an introduction to help set the themes. As part of this I had to make several adjustments to linting to help things align.

References #23

What is the nature of your change?

• [x] Content additions or updates (adds or updates content)
• [ ] Bug fix (fixes an issue).
• [x] Enhancement (adds functionality).
• [ ] Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

Please ensure that all boxes are checked before indicating that this pull request is ready for review.

• [x] I have read the CONTRIBUTING.md guidelines.
• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own contributions.
• [x] I have commented my content, particularly in hard-to-understand areas.
• [ ] I have made corresponding changes to related documentation (outside of book content).
• [x] My changes generate no new warnings.
• [x] New and existing tests pass locally with my changes.
• [ ] I have added tests that prove my additions are effective or that my feature works.
• [x] I have deleted all non-relevant text in this pull request template.

[netlify[bot]]

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[d33bs]

Thank you @gwaybio and @falquaddoomi for your reviews! I've addressed all comments and will merge this in now. Note: the Netlify previews appear to be having an issue which is unrelated to the changes in code (Python location within Netlify environment).