How do I document macros?

Changelog

To document macros, use a schema file and nest the configurations under a models: key

Example:

models/schema.yml
version: 2
models:
- name: cents_to_dollars
description: A macro to convert cents to dollars
arguments:
- name: column_name
type: string
description: The name of the column you want to convert
- name: precision
type: integer
description: Number of decimal places. Defaults to 2.