Setup Redirects from Make/Core/Handbook to dev.w.org/coding-standards

[netweb]

Here's the full list of 9 URLs requiring redirects:

https://make.wordpress.org/core/handbook/best-practices/coding-standards/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/

https://make.wordpress.org/core/handbook/best-practices/coding-standards/accessibility-coding-standards/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/accessibility/

https://make.wordpress.org/core/handbook/best-practices/coding-standards/css/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/css/

https://make.wordpress.org/core/handbook/best-practices/coding-standards/html/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/html/

https://make.wordpress.org/core/handbook/best-practices/coding-standards/javascript/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/javascript/

https://make.wordpress.org/core/handbook/best-practices/coding-standards/php/
https://developer.wordpress.org/coding-standards/wordpress-coding-standards/php/

https://make.wordpress.org/core/handbook/best-practices/inline-documentation-standards/
https://developer.wordpress.org/coding-standards/inline-documentation-standards/

https://make.wordpress.org/core/handbook/best-practices/inline-documentation-standards/php/
https://developer.wordpress.org/coding-standards/inline-documentation-standards/php/

https://make.wordpress.org/core/handbook/best-practices/inline-documentation-standards/javascript/
https://developer.wordpress.org/coding-standards/inline-documentation-standards/javascript/

The above can be grouped primarily into two groups and a third for an exception to the first group rule

1. "coding-standards"

   From: https://make.wordpress.org/core/handbook/best-practices/coding-standards/
   To  : https://developer.wordpress.org/coding-standards/
   

2. "inline-documentation-standards"

   From: https://make.wordpress.org/core/handbook/best-practices/inline-documentation-standards/
   To  : https://developer.wordpress.org/coding-standards/inline-documentation-standards
   

3. "accessibility-coding-standards" slug was changed to "accessibility"

   From: https://make.wordpress.org/core/handbook/best-practices/coding-standards/accessibility-coding-standards/
   To  : https://developer.wordpress.org/coding-standards/wordpress-coding-standards/accessibility/
   

[coffee2code]

Fixed in [dotorg17826]:

Make/Core: Redirect certain code standards handbook pages to the Coding Standards Handbook in DevHub.

Props netweb, coffee2code.
Fixes #5853.

I've only added the redirects and haven't done anything with regards to unpublishing the existing code standards pages or any content changes to reflect the relocations.