Add CI test workflow

.forgejo/workflows/test.yml

@@ -0,0 +1,26 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - master
+      - testing
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container:
+      image: python:3.12-slim
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: pip install --no-cache-dir -r requirements.txt
+
+      - name: Django system check
+        run: python manage.py check
+
+      - name: Run tests
+        run: python manage.py test