Enable the same style check actions with inline annotations about style issues

for the experimental+next branches as well. Does not cause errors and the
annotatios can be hidden in the files diff view on PRs.

Author: jonasbardino

.github/workflows/python-stylecheck.yml

@@ -0,0 +1,38 @@
+name: Python Style Checks
+
+on:
+  push:
+    branches:
+      - experimental
+      - next
+  pull_request:
+    branches:
+      - experimental
+      - next
+
+jobs:
+  stylecheckpython:
+    name: Style Check Python with Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out source repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # This is necessary to get the commits
+      - name: Get changed python files between base and head
+        run: >
+          echo "CHANGED_FILES=$(echo $(git diff  --diff-filter=ACMRTB --name-only ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} -- | grep -E '\.py$'))" >> $GITHUB_ENV
+      - if: ${{ env.CHANGED_FILES }}
+        uses: marian-code/python-lint-annotate@v4
+        with:
+          python-root-list: ${{ env.CHANGED_FILES }}
+          extra-pycodestyle-options: "--max-line-length=80"
+          extra-black-options: "--line-length=80"
+          extra-isort-options: "--line-length=80 -m=HANGING_INDENT"
+          # NOTE: we disable flake8 and pylint here to avoid overlap with lint action and limit noise
+          use-flake8: false
+          extra-flake8-options: "--max-line-length=80"
+          use-pylint: false
+          # NOTE: pylint C0209 string format suggestions requires python3.6+ so disable here
+          # https://pylint.pycqa.org/en/latest/user_guide/messages/convention/consider-using-f-string.html
+          extra-pylint-options: "--max-line-length=80 --disable=C0209"