Remove and clean up content-websites-responsibility following migration

Jamie Maynardrequested to merge
removing-content-websites-responsibility-and-adding-redirects into master

This MR adds redirects for the content-websites-responsibility section of the handbook that has been migrated. It removes all migrated code and replaces the content with a README.md advising where this section of the handbooks code has moved to and where to get help.

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