Revert "Remove flymake-ruff package"

This reverts commit 20691ddff5.

config/ide.org

@@ -174,6 +174,15 @@ Set treesit to fontify all elements, default was 3 (out of 4)
     :hook (js-ts-mode . flymake-eslint-enable))
 #+end_src
 
+** ruff
+#+begin_src emacs-lisp
+  (use-package flymake-ruff
+    :ensure t
+    :after flymake
+    :diminish
+    :hook (python-base-mode . flymake-ruff-load))
+#+end_src
+
 * Project
 #+begin_src emacs-lisp
   (setq project-switch-use-entire-map t