[ci] add ruff linter

.drone.yml

@@ -3,7 +3,13 @@ kind: pipeline
 name: lint
 
 steps:
+- name: python lint with ruff
+  image: pipelinecomponents/ruff
+  commands:
+  - ruff .
+
 - name: python lint
   image: cytopia/pylint
   commands:
   - find . -type f -name "*.py" | xargs pylint
+

.ruff.toml

@@ -0,0 +1,2 @@
+[lint]
+ignore = ["E741"]