Accessibility statement for DIA

[jessishakarian]

• Draft by March 9?
• Review by Grace, Justin
• Post by Mar 15, after Blog post to share a11y initiatives #16

Note: Be sure to update #16 with links to accessibility statement.

[jessishakarian]

Link: https://docs.google.com/document/d/1_GLvksNb_l1Zyk9U3s7JOy7WmKQVsI9wOS_D14sS6mE/edit?usp=sharing