Add initial version of gh workflow

.github/workflows/quality_checks.yaml

@@ -0,0 +1,40 @@
+name: Tests and quality checks
+on: [pull_request]
+
+jobs:
+  run_tests:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies and the package
+        run: |
+          python -m pip install --upgrade pip poetry
+          poetry install
+      - name: Run unit tests
+        run: poetry run pytest
+
+  run_quality_checks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.10"
+      - uses: actions/checkout@v2
+      - name: Setup poetry
+        uses: abatilo/actions-poetry@v2
+      - name:
+        run: |
+            poetry install
+            pip install pre-commit
+            pre-commit install
+            pre-commit run -a
+      - name: Run mypy
+        run: MYPYPATH=src poetry run mypy --install-types --non-interactive src