feat(a11y): Write a11y checklist guidance.
feat(a11y): Write a11y checklist guidance.

Closes #134.

chanceaclark/rocketbelt,Pier1/rocketbelt,jkeddy/rocketbelt,jkeddy/rocketbelt,Pier1/rocketbelt,chanceaclark/rocketbelt,jkeddy/rocketbelt,chanceaclark/rocketbelt