wp-rest-api-auth0

• Added M2M token support
• Added PHPCS scans

• Add debugging log outputs with a AUTH0_API_DEBUG PHP constant set to true
• Better authorization header checking
• Remove the namespace for the PHP constants
• Allow PHP 8.x

• fix: meta key is incorrect for non-default database table prefix [#9] 3d7965ceffcbc48ae1e6d64ae037c4e57256b66f

Remove PHP SDK dependency to rely on Login by Auth0 plugin. This is technically a breaking change since it requires the Auth0 WordPress plugin to be installed but this plugin would not have done much without that in the first place.

Adjust file structure to make this uploadable