Redirects for Coding standard pages to GitLab pages

Problem/Motivation

The Drupal Coding Standards guide → have been converted to a repository to create GitLab pages . But the existing URLs and go to the d.o documentation instead of the new pages.

Steps to reproduce

Go to https://www.drupal.org/docs/develop/coding-standards/namespaces → and see the d.o version instead of the GitLab pages version.

Proposed resolution

Add redirects as needed
Deprecate the d.o pages and finally delete them
Any thing else?

Remaining tasks

Add redirects as needed
Deprecate the d.o pages and finally delete them
Any thing else?

User interface changes

API changes

Data model changes