Add files via upload

Author: AmirhosseinHonardoust

.github/workflows/ci.yml

@@ -6,6 +6,34 @@ on:
   workflow_dispatch:
 
 jobs:
+  lint:
+    name: Lint and type-check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: "pip"
+
+      - name: Install tooling
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff black mypy
+
+      - name: Ruff
+        run: ruff check src app.py tests
+
+      - name: Black
+        run: black --check src app.py tests
+
+      - name: Mypy
+        run: mypy src app.py
+
   test-and-smoke:
     name: Test and smoke workflow on Python ${{ matrix.python-version }}
     runs-on: ubuntu-latest