chore: setup pre-commit (#234)

* chore: add pre-commit config

* chore: fix pre-commit errors

* chore: add black pre-commit hook

* style: format python files with black

* chore: add isort pre-commit hook

* style: format python files using isort

* chore: add pyupgrade pre-commit hook

* refactor: upgrade code to python3.7

* Allow stacking PRs

Co-authored-by: Julian Tölle <julian.toelle97@gmail.com>

---------

Co-authored-by: Julian Tölle <julian.toelle97@gmail.com>

.gitlab-ci.yml

@@ -1,4 +1,5 @@
 stages:
+  - lint
   - sanity
   - integration
 
@@ -8,6 +9,16 @@ variables:
 default:
   image: python:$PYTHON_VERSION
 
+pre-commit:
+  stage: lint
+
+  image: python:3.11-alpine
+  before_script:
+    - apk add build-base git
+    - pip install pre-commit
+  script:
+    - pre-commit run --all-files --show-diff-on-failure
+
 sanity:
   stage: sanity
   allow_failure: true