chore: add workflow for snapshot builds

.github/workflows/snapshots.yml

@@ -0,0 +1,34 @@
+name: 'Run Tests'
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 12 * * 1'
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '11'
+          distribution: 'temurin'
+
+      - name: Fetch Onkostar-API
+        run: |
+          curl -L --user dnpm:${{ secrets.PACKAGE_TOKEN }} \
+            https://git.dnpm.dev/api/packages/Plugin-JF-Onkostar/generic/onkostar-api/2.11.1.6/onkostar-api-2.11.1.6.jar \
+            --output ${{ github.workspace }}/libs/onkostar-api-2.11.1.6.jar
+
+      - name: Create package
+        run: mvn package
+
+      - name: Release
+        uses: softprops/action-gh-release@v2
+        with:
+          draft: 'true'
+          make_latest: 'true'
+          generate_release_notes: 'true'
+          files: |
+            target/onkostar-plugin-dnpmexport*.jar