VarSetType rename to SetVarType, add phan/phpstan/phpunit tests

Breaking change:
VarSetType/VarSetTypeNull classes have been renamed to
SetVarType/SetVarTypeNull

Added phan/phpstan static checkes and settings
Add phpunit tests (in test/phpunit) that are an exact copy from the
trunk folder unit tests

The phan/phpstan tests have been updated to work with the composer layout

config files with static defines needed for certain classes are stored
in test/configs (config.php, config.other.php, config.master.php)

src/Template/SmartyExtend.php

@@ -453,7 +453,7 @@ class SmartyExtend extends \Smarty
 				$this->DATA['nav_menu_count'] = count($this->DATA['nav_menu']);
 				// messages = ['msg' =>, 'class' => 'error/warning/...']
 				$this->DATA['messages'] = $cms->messages;
-			} else { /** @phpstan-ignore-line Because I assume object for phpstan */
+			} else {
 				$this->DATA['show_ea_extra'] = false;
 				$this->DATA['ADMIN'] = 0;
 				$this->DATA['nav_menu'] = [];