Clean-up and reorganize the research wiki on GitHub

[brunerae]

The research wiki on GitHub needs to be cleaned-up and reorganized. The UX research and a11y team members will meet to discuss, plan, and ultimately present a process and place to house accessibility and research resources. Some questions and items to include are:

• where will the content be housed?
• will it be discoverable?
• will it have tracking?
• what content will be included? (structure)
• how will it be updated
• when will it be updated
• will we incorporate community guidelines