Review lessons on learn.wordpress.org for inclusion with the docs

[rianrietveld]

On learn.wordpress.org/courses "accessibility" is not in the topics filter, but if you search for accessibility 59 results are found.

This is useful content to add as resources to related topics in the documentation.

We can review the lessons (or find existing reviews) and if suitable add links to them with the resources of the related topics.

We also need to find out how to add "Accessibility" as a topic on learn.wordpress.org. This seems useful to me as there are so many lessons about it.

The a11y lessons can be found on GitHub as closed issues on: github.com/WordPress/Learn.

Tasks

• Create a list of lessons about accessibility on learn.wordpress.org.
• Review them or find reviews.
• If a lessons is suitable, add them to the related topics as resource.
• If a lessons is not suitable, give feedback about what needs to change on github.com/WordPress/Learn.
• Ask for a topic "Accessibility" with the filters on learn.wordpress.org/courses.