[ci] create woodpecker pipline thing

It's gonna break anyway

.woodpecker/workflow.yaml

@@ -0,0 +1,11 @@
+when:
+  - event: push
+    branch: main
+
+steps:
+  - name: lint-and-test
+    image: debian
+    commands:
+      - pip install -r requirements/test.txt
+      - ruff check src
+      - python -m pytest