suggested content for wai/EO's page on "introduction to cognitive and learning disabilities"

Hi Folks

I made a draft page as an introduction to cognitive and learning
disabilities, for EO web pages

See https://docs.google
<https://docs.google.com/document/d/19hM0yrnniybRkkLcNqMtX-W-dy5CJ2IIxKY44rpMFWs/edit?usp=sharing>

The idea is that it can replace their page at abilities-barriers-cognitive/
<https://deploy-preview-113--wai-people-use-web.netlify.app/people-use-web/abilities-barriers-cognitive/>
)

Please feel free to make changes, suggestions etc.

All the best
Lisa