Add release workflow

.github/workflows/release.yml

@@ -0,0 +1,56 @@
+name: 🚀 Release
+
+on:
+  workflow_dispatch:
+
+env:
+  NODE_VERSION: 20
+  PNPM_VERSION: 9
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@v4
+
+      - name: Check version
+        id: meta
+        run: |
+          VERSION=$(jq -r .version manifest.json)
+          echo "version=${VERSION}" >> $GITHUB_OUTPUT
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+          run_install: true
+
+      - name: Build package
+        run: pnpm build
+
+      - name: Sign package
+        working-directory: dist
+        run: |
+          if [[ -z "${{ secrets.PRIVATE_KEY }}" ]]; then
+            echo "Set an ed25519 key as PRIVATE_KEY in GitHub Action secret to sign."
+          else
+            echo "${{ secrets.PRIVATE_KEY }}" > private_key.pem
+            openssl pkeyutl -sign -inkey private_key.pem -out plugin_package.zip.sig -rawin -in plugin_package.zip
+            rm private_key.pem
+          fi
+
+      - name: Create release
+        uses: ncipollo/release-action@v1
+        with:
+          tag: ${{ steps.meta.outputs.version }}
+          commit: ${{ github.sha }}
+          body: 'Release ${{ steps.meta.outputs.version }}'
+          artifacts: 'dist/plugin_package.zip,dist/plugin_package.zip.sig'