ci: release (draft) build action

.github/workflows/release.yml

@@ -0,0 +1,50 @@
+name: Release
+
+on:
+  workflow_dispatch:
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - run: mvn package
+
+      - uses: actions/upload-artifact@v4
+        with:
+          path: target/SilkSpawners_v2.jar
+
+  release:
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+
+      # https://github.com/actions/checkout/issues/1471
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          filter: tree:0
+
+      - uses: actions/download-artifact@v4
+
+      - id: tag
+        run: echo "latest=$(git describe --tags --abbrev=0)" >> $GITHUB_OUTPUT
+
+      - run: echo ${{ steps.tag.outputs.latest }}
+
+      - uses: softprops/action-gh-release@v2
+        with:
+          draft: true
+          name: ${{ steps.tag.outputs.latest }}
+          tag_name: ${{ steps.tag.outputs.latest }}
+          files: artifact/*