proposed: Building site structures #152

Proposed title and location of new page...
https://docs.textpattern.com/build/site-structures

Situation/Scenario for proposal

A single doc that returns to a holistic discussion of building website structures in terms of semantic building blocks

Value

Folds in the panel docs pages for sections, pages, and forms.
Ties with concepts discussed in context of themes doc.

Resources to consider for draft

Add information text and link

• Section link
• Pages link
• Forms link
  etc