feat(ci): add python linter to python CI jobs

Author: rustaceanrob

.github/workflows/test-python.yaml

@@ -192,3 +192,15 @@ jobs:
 
       - name: "Run tests"
         run: python -m unittest discover --start "./tests/" --pattern "test_offline_*.py" --verbose
+
+  ruff:
+    name: "Lint tests"
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: bdk-python
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/ruff-action@v3
+        with:
+          src: "./tests/"