code style: line breaks

coding style: control flow line breaks

coding style: control flow whitespaces

codestyle adjustments: function declaration braces/spaces

codestyle adjustments: class declaration braces

Fix various errors in PHPUnit tests on PHP 8

handle draftdeletion in draftdel action only

This was the last remaining function in inc/action.php that could be
moved to the actions.

We now have quite the elegant cascade in the action handling.

introduce a redirect action

Action can now abort to 'redirect' to explicitly trigger a redirect
back to showing the current page. Automatic triggering for post->show is
now only done when a 'show' a

introduce a redirect action

Action can now abort to 'redirect' to explicitly trigger a redirect
back to showing the current page. Automatic triggering for post->show is
now only done when a 'show' action was not explicitly requested.

show more ...

explicitly declare method visibility

more doc block fixes

all actions should have a class now

Lots of FIXMEs and the routing isn't integrated, yet