* Changes for dynamic templates.
* Clarifying language around dynamic:true and dynamic:runtime.
* Clarifying edits and some restructuring.
* Overhauling the Mapping page.
* Incorporating changes from #66911.
* Reworking mapping page to focus on dynamic vs. explicit mapping.
* Reordering to fix test failure.
* Further clarifying mapping page.
* Reordering sections, adding headings to examples, and other clarifications.
* Incorporating review feedback.
* Adding description of for Painless script.
* Minor revisions.
