Add ability to link markdown files as docs in @GallerySectionConfig annotations
Add ability to link markdown files as docs in @GallerySectionConfig annotations

Files need to be referenced as package assets (like imports and exports).

The .md file are rendered as html in the gallery with the dartdocs for a component.

If the markdown contains links to images they need to be referenced from the repo root to allow for a simple config option in the builder to apply a static image server prefix to the location. (externally https://raw.githubusercontent.com/repo/...)

PiperOrigin-RevId: 190679359

angulardart/angular_components,angulardart/angular_components,angulardart/angular_components