* Don't require package tag or file comment inside src
* Removed package tag from files inside src
* Fixed tests directory in phpcs.xml.dist
* Fixed usage of package tag
* Fixed new classes
* Fixed coding standards
* Fixed coding standards in tests
* Add theme upload REST api controller
* Add theme data to theme controller response
* Add tests for themes api
* Change user cap check to upload_themes
* Add test for users without theme capabilities