update CI action to enforce hooks

.github/workflows/pydna_test_and_coverage_workflow.yml

@@ -61,6 +61,25 @@ jobs:
       - name: 🔎 poetry run python run_test.py
         run: poetry run python run_test.py
 
+      # Enforce pre-commit hooks ===========================
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v45
+
+      - uses: actions/cache@v4
+        id: cache-precommit
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ runner.os }}-precommit-hooks-v2-${{ hashFiles('**/.pre-commit-config.yaml') }}
+
+      - name: Installing pre-commit hooks (cached)
+        if: steps.cache-precommit.outputs.cache-hit != 'true'
+        run: poetry run pre-commit install --install-hooks
+
+      - name: Run style checking via pre-commit
+        run: poetry run pre-commit run --files ${{ steps.changed-files.outputs.all_changed_files }}
+      # ======================================================
+
       - name: 🔼 Upload coverage to Codecov
         if: (matrix.codecov)
         uses: codecov/[email protected]