Add support for generating parameter attributes for the manual (#14270)

Author: kocsismate

build/gen_stub.php

@@ -2101,6 +2101,13 @@ public function getMethodSynopsisElement(array $funcMap, array $aliasMap, DOMDoc
                 }
 
                 $methodSynopsis->appendChild($methodparam);
+                foreach ($arg->attributes as $attribute) {
+                    $attribute = $doc->createElement("modifier", "#[\\" . $attribute->class . "]");
+                    $attribute->setAttribute("role", "attribute");
+
+                    $methodparam->appendChild($attribute);
+                }
+
                 $methodparam->appendChild($arg->getMethodSynopsisType()->getTypeForDoc($doc));
 
                 $parameter = $doc->createElement('parameter', $arg->name);