Release v2.3.0

Version 2.3.0

* fix multiple Undefined array key log warnings occurring since php7 or 8
* [Dev Breaking Change] Moved WordPress plugin files from the document-git/ subfolder to the root folder to follow best practices. This change improves maintainability but may cause issues when comparing files before and after this commit. Note: This does not affect end users.

Release v2.2.0

Version 2.2.0

* latest WordPress plugin directory release (copy of nilsnode's version)