Run isort, flake8

Signed-off-by: Yurii Serhiichuk <savik.ne@gmail.com>

Author: xSAVIKx

.github/workflows/main.yml

@@ -19,6 +19,10 @@ jobs:
         run: uv sync --all-extras --dev
       - name: Lint
         run: uv run ruff check
+      - name: isort
+        run: uv run isort -c src/cloudevents
+      - name: flake8
+        run: uv run flake8 src/cloudevents --ignore W503,E731 --extend-ignore E203 --max-line-length 88
 
   test:
     strategy: