- Added while/endwhile and do/while syntaxes

- Fix the abstractclass requirement of parse() function

src/Extension/TitleExtension.php

@@ -19,7 +19,7 @@ class TitleExtension implements Extension {
         $context->pushFunction("title", [ $this, 'handleTitle' ]);
     }
     
-    public function parse(/*\Picae\Compiler\Context*/ &$context, ?string $arguments, string $token) {
+    public function parse(\Picea\Compiler\Context &$context, ?string $arguments, string $token) {
         return "<?php echo title($arguments) ?>";
     }