Run lint in woodpecker

.woodpecker/run_lint.yml

@@ -0,0 +1,16 @@
+steps:
+  tests:
+    image: codeberg.org/freeyourgadget/android-fdroid-tools:latest
+    commands:
+      - pwd #bump
+      - ./gradlew lint
+
+#when:
+#repo: Freeyourgadget/Gadgetbridge
+#branch: master
+#this doesn't work yet:
+#https://github.com/woodpecker-ci/woodpecker/issues/687
+
+when:
+  event:
+    exclude: cron