add clippy lint list to Rust dropdown menu

Author: llogiq

templates/header/topbar_end.html

@@ -65,6 +65,12 @@
                                 text="The Cargo Guide",
                                 target="_blank"
                             ) }}
+
+                            {{ macros::menu_link(
+                                href="https://doc.rust-lang.org/nightly/clippy",
+                                text="Clippy Documentation",
+                                target="_blank"
+                            ) }}
                         </ul>
                     </li>
                 </ul>