Restructuring the Guides Table of Contents (#431)

* initial commit

* update implementation plan

* formatting

* proofreading

* disclaimers

* say where conversion guides will go

* update to list syntax for vue comparison

* Update and rename 0000-guides-restructure.md to 0431-guides-restructure.md

* Add reference section w/Accessibility

* Add tracked to state management, suggested by gossi

* Clarify naming of "handlebars" as suggested by nullvox and gaurav

* Update 0431-guides-restructure.md

* rename debugging to developer tools

* make it explicit that these efforts don't block Octane

* reunite template syntax and helpers

* Add audience section

* audience hypothesis

* add editions guide explicitly to the upgrading section

* fix markdown formatting bullet points

* more bullets formatting

* Update text/0431-guides-restructure.md

Co-Authored-By: jenweber <jen@biobright.org>

* Update text/0431-guides-restructure.md

Co-Authored-By: jenweber <jen@biobright.org>

* Update text/0431-guides-restructure.md

Co-Authored-By: jenweber <jen@biobright.org>

* Update text/0431-guides-restructure.md

Co-Authored-By: jenweber <jen@biobright.org>

* Add tracking issue