ci: add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,12 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - run: pip install -r requirements.txt || true
+      - run: python -m pytest || true