Add pg4wp plugin and update wordpress.yaml

pg4wp/rewriters/ShowTablesSQLRewriter.php

@@ -0,0 +1,10 @@
+<?php
+
+class ShowTablesSQLRewriter extends AbstractSQLRewriter
+{
+    public function rewrite(): string
+    {
+        $schema = "public";
+        return 'SELECT tablename FROM pg_tables WHERE schemaname = \'$schema\';';
+    }
+}