Add pg4wp plugin and update wordpress.yaml

pg4wp/rewriters/SetNamesSQLRewriter.php

@@ -0,0 +1,9 @@
+<?php
+
+class SetNamesSQLRewriter extends AbstractSQLRewriter
+{
+    public function rewrite(): string
+    {
+        return "SET NAMES 'utf8'";
+    }
+}