Update plugin authoring guide per style guide (#19787)
Update plugin authoring guide per style guide (#19787)

* update plugin authoring guide per style guide

Adds more explanations to terminology, as some readers may not be familiar with the concepts

* Apply suggestions from code review

Co-Authored-By: LB <215e3d7c445b99629add69586ce9b88253e8211e@gmail.com>

ilcm96/ilcm96.github.io