add: GitHub Actions CI

Author: Neo

.github/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install flake8
+
+      - name: Lint with flake8
+        run: |
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude=.venv,migrations
+
+      - name: Check imports
+        run: |
+          python -c "import gateway; print('gateway OK')" || true
+          python -c "import runtime; print('runtime OK')" || true