ci: add linter action

.github/workflows/main.yml

@@ -0,0 +1,40 @@
+name: test & lint
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    types: [opened, reopened]
+  workflow_dispatch:
+
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dev dependencies
+        run: 'pip install .[dev]'
+      - name: Run tests
+        run: 'pytest -v'
+
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install dev dependencies
+        run: 'pip install .[dev]'
+      - name: Run linter
+        run: 'ruff check'

.github/workflows/test.yml

@@ -1,25 +0,0 @@
-name: Run tests
-
-on:
-  push:
-    branches:
-      - '*'
-  pull_request:
-    types: [opened, reopened]
-  workflow_dispatch:
-
-jobs:
-  pytest:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - run: 'pip install .[dev]'
-      - run: 'pytest -v'