ci: add pr workflow

.github/workflows/python-pull-request.yml

@@ -0,0 +1,23 @@
+# This workflow will upload a Python Package using Twine when a release is created
+# For more information see: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries
+
+name: Code Quality checks for PRs
+
+on:
+  push:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  quality:
+    uses: ecmwf-actions/reusable-workflows/.github/workflows/qa-precommit-run.yml@v2
+    with:
+      skip-hooks: "no-commit-to-branch"
+
+  checks:
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10"]
+    uses: ecmwf-actions/reusable-workflows/.github/workflows/qa-pytest-pyproject.yml@v2
+    with:
+      python-version: ${{ matrix.python-version }}