Add positive examples

[klwetstone]

works on #169

• Adds positive examples
• Changes the language describing the examples to include both negative and positive
• Revamps the "background" section on deon's homepage to make the information more navigable. I didn't change any of the wording, just reordered and did some formatting
• Removes a link to a "Related academic study" when the academic study is clearly linked from the primary article

Only the .yml and .tpl files are updated. README.md, index.md, and examples.md should all get updated when make docs is run in the github actions. If it's easier, I can also track the changes to the markdown files.

Future work

• continue adding more positive examples. Try to get close to 1 per checklist item / slightly more balanced between positive and negative.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.80%. Comparing base (f39f293) to head (f185970).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #175   +/-   ##
=======================================
  Coverage   96.80%   96.80%           
=======================================
  Files           6        6           
  Lines         188      188           
=======================================
  Hits          182      182           
  Misses          6        6           

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[pjbull]

This looks great to me, thanks @klwetstone!