[docs] Add initial accessibility statement for Docs

Author: andrewnicols

general/documentation/accessibility.md

@@ -0,0 +1,10 @@
+---
+title: Accessibility
+description: This page discusses the accessibility of the developer documentation site, including any policies and certifications that are adhered to.
+tags:
+  - Accessibility
+  - Compliance
+  - Certification
+---
+
+The Moodle Developer resources are designed to provide equal functionality and access to information for all people. There should be no barrier for people regardless of any disabilities, or assistive technologies that are used, different screen sizes, and different input devices (for example mouse, keyboard and touchscreen).