add: workflow for publishing to maven central

.github/workflows/publish.yml

@@ -31,6 +31,9 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@417ae3ccd767c252f5661f1ace9f835f9654f2b5 # v3.1.0
 
+      - name: Set up GPG
+        uses: olafurpg/setup-gpg@v3
+
       # Step to grant execute permissions to the Gradle wrapper script
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
@@ -47,6 +50,9 @@ jobs:
       - name: Add signing password to gradle.proeprties
         run: echo "signing.password=${{ secrets.OSS_SIGNING_PASSWORD }}" >> gradle.properties
 
+      - name: create secring.gpg file
+        run: gpg --export-secret-keys -o secring.gpg
+
       - name: Decode and set up GPG secring file
         env:
           GPG_SECRET_RING: ${{ secrets.SECRET_FILE_CONTENT }}