"Read more about setting up your local development environment" needs to link somewhere useful

[johnbillion]

The Read more about setting up your local development environment link introduced in [43309] links to the Codex home page. It needs to link to somewhere useful.

The link is present in both src/index.php and src/wp-admin/index.php.

[SergeyBiryukov]

​https://make.wordpress.org/core/handbook/tutorials/installing-wordpress-locally/, perhaps?

[abdullahramzan]

Replace Codex Home Page with ​https://make.wordpress.org/core/handbook/tutorials/installing-wordpress-locally/

[netweb]

Yes, let's go with ​https://make.wordpress.org/core/handbook/tutorials/installing-wordpress-locally/ as it is the top-level document in that section of the core hadnbook.

We can then start adding the ​additional docs from #43055 to the appropriate handbook pages.

[netweb]

Related: #43732 Improve wording on notice preventing development from src directory

[SergeyBiryukov]

In 43328:

Build/Test Tools: Replace Codex home page link in "Read more about setting up your local development environment" with a more specific handbook link.

Props abdullahramzan, johnbillion.
Fixes #44228.