Autogenerate templates with metadata in standard docs

[mariongalley]

* It's clear how the world will be different when the work is completed

The templates in the standard docs will be autogenerated with a Meta tab

* It's clear what will and won't be done

The templates in the standard docs that are currently supplied by hand will be build using the flatten-tool work in https://trello.com/c/kkewnYvf/42-create-metatab-when-running-flatten-tool-create-template

* Any uncertainty, assumptions, dependencies or constraints are recorded

Depends on https://trello.com/c/kkewnYvf/42-create-metatab-when-running-flatten-tool-create-template

* There's an order-of-magnitude estimate of how long it will take

* The work's been approved by someone at 360

In Ready queue reviewed July 2020 with 360 team

* There's links to everything that's written down about the work - such as plan.io tickets, GitHub issues

[mariongalley]

Autogenerate templates with metadata in standard docs