implement osis actor

examples/scripts/core.rhai

@@ -0,0 +1,9 @@
+// core.rhai
+
+let new_comment = new_comment()
+    .user_id(1)
+    .content("This is a test comment.")
+    .parent_comment_id(0)
+    .save_comment();
+
+print(new_comment);