ci: add Gitea Actions Python version matrix

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/test.yml

@@ -0,0 +1,30 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+
+      - name: Install Python ${{ matrix.python-version }}
+        run: uv python install ${{ matrix.python-version }}
+
+      - name: Create venv
+        run: uv venv --python ${{ matrix.python-version }}
+
+      - name: Install project and pytest
+        run: uv pip install . pytest
+
+      - name: Run smoke tests
+        run: uv run pytest -v