chore: add pre-commit config

.pre-commit-config.yaml

+repos:
+  - repo: https://github.com/psf/black
+    rev: 22.8.0
+    hooks:
+    - id: black
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.10.1
+    hooks:
+      - id: isort
+  - repo: https://github.com/codespell-project/codespell
+    rev: "v2.2.1"
+    hooks:
+      - id: codespell
+        args: [""]
+  - repo: https://github.com/PyCQA/flake8
+    rev: 5.0.4
+    hooks:
+      - id: flake8
+        args: ["--config=.flake8"]
+        # TODO umcomment when #28 is done (https://gitlab.servus.at/aura/engine-api/-/issues/28)
+        # additional_dependencies: [
+        #   "flake8-docstrings"
+        # ]
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