Attempt to add forgejo workflow (!2)

Reviewed-on: #2

.forgejo/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: docker
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          apt-get update
+          DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+            python3-venv pipx libgl1 libxcb-cursor0 libxkbcommon-x11-0 libegl1 libdbus-1-3 \
+            libopengl0 libx11-6 libxext6 libxi6 libxrender1 libxrandr2 \
+            libxcb1 libxcb-render0 libxcb-keysyms1 libxcb-image0 libxcb-shm0 \
+            libxcb-icccm4 libxcb-xfixes0 libxcb-shape0 libxcb-randr0 libxcb-xinerama0 \
+            libxkbcommon0
+
+      - name: Install Poetry
+        run: |
+          pipx install poetry==1.8.3
+          /root/.local/bin/poetry --version
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+
+      - name: Install project deps (including test extras)
+        run: |
+          poetry install --with test
+
+      - name: Run test script
+        run: |
+          ./tests.sh
+