Add GitHub CI

Author: NonlinearFruit

.github/workflows/ci.yaml

@@ -0,0 +1,13 @@
+on: [push]
+
+jobs:
+  run-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup PDM
+        uses: pdm-project/setup-pdm@v4
+      - name: Install dependencies
+        run: pdm install
+      - name: Run tests
+        run: pdm run test