[CHANGE] Support Authors to Produce Accessible Content

[mgifford]

2.3 Standards are as follows:
https://a11y.canada.ca/en/standards/standard/#2.3.3.1

We really need to include Authoring Tool Accessibility Guidelines (ATAG) 2.0 https://www.w3.org/TR/ATAG20/

This is a Canadian standard, but it is also a key aspect of being able to meet targets for EN 301 549. Authors should be able to expect an accessible authoring interface and be given support to produce accessible content. We know that providing training for authors hasn't been sufficient.

Another great example came from the work of Funka in their work for the EC which can be found https://accessibilitycluster.com/

Authors cannot be left as an afterthought.

Canadian tools like https://sa11y.netlify.app/ are simple open source implementations that can help authors, as can simply installing Microsoft's Accessibility Insights https://accessibilityinsights.io/ by default (because it is open source, accessible & works well in Edge), by default in government implementations of Edge.

Authors need access to these tools so that they don't need to be an accessibility expert to find basic accessibility barriers. Browser extensions like this are like training wheels for accessibility standards.