New content: Accessibility statement

[thibaudcolas]

I’d like to request a new page for the website – an Accessibility Statement page available at https://www.djangoproject.com/accessibility/.

This feels important to me so we can express our commitment to accessibility, in a format and at a place that people unfamiliar with Django will understand. See for example the diversity statement.

As far as content – here are recommendations from W3C.

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For reference, we’re also making progress on accessibility guidelines for contributors. I expect the information on this new statement page will similar, just written for a different audience.

[thibaudcolas]

Thought I should also add we’ve already been recommended to build this as a template within the project’s code. @sabderemane has offered to investigate how to do this.