ci: add packing job

.github/workflows/package.yaml

@@ -0,0 +1,29 @@
+name: Package
+
+on:
+  push:
+
+jobs:
+  package:
+    runs-on: ubuntu-24.04
+    strategy:
+      matrix:
+        platform: [linux/arm64/v8]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          platforms: linux/arm64
+
+      - name: Prepare container
+        run: docker buildx build -f ci/Dockerfile . -t libcreate --platform ${{ matrix.platform }} --load
+      - name: Build
+        run: docker run --platform ${{ matrix.platform }} -v ./output:/libcreate/_packages libcreate