ci: add lint + test workflow (ruff check/format, pytest on py3.10 & 3.12)

.github/workflows/ci.yml

@@ -0,0 +1,53 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    name: Lint (ruff)
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install ruff
+        run: pip install ruff
+
+      - name: ruff check
+        run: ruff check .
+
+      - name: ruff format --check
+        run: ruff format --check .
+
+  test:
+    runs-on: ubuntu-latest
+    name: Tests (py${{ matrix.python }})
+    strategy:
+      fail-fast: false
+      matrix:
+        python: ["3.10", "3.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python }}
+
+      # bcc_core has no GUI imports, so the test suite needs no PySide6 —
+      # keeps CI fast and avoids Qt system-library headaches on the runner.
+      - name: Install test dependencies
+        run: pip install pytest
+
+      - name: Run tests
+        run: python -m pytest -v