feat: Added tasks with no projects to default calendar

lib/Configs/TaskwarriorConfig.php

@@ -17,8 +17,12 @@ class TaskwarriorConfig {
                   ->defaultValue('~/.taskrc')
                   ->info('The enivronment variable overrides the default and the command line specification of the .taskrc file')
                 ->end()
+                ->scalarNode('default_calendar')
+                  ->info('The default calendar to send tasks if no task project is set. The value is the calendar\'s displayname')
+                ->end()
               ->end();
 
     return $node;
   }
 }
+