ci: add gh action for publishing on release

Author: matey97

.github/workflows/publish.yaml

@@ -0,0 +1,42 @@
+name: Publish to Maven Central
+
+on:
+  workflow_dispatch:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    name: Publish Release Artifacts
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+
+      - name: Validate Gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      - name: Set up Java 11 JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'
+          java-version: 11
+          architecture: x64
+          cache: 'gradle'
+          check-latest: true
+
+      - name: Change wrapper permissions
+        run: chmod +x ./gradlew
+
+      - name: Decode GPG Key
+        run: |
+          mkdir -p ~/.gradle/
+          echo "${{secrets.OSSRH_GPG_SECRET_KEY}}" > ~/.gradle/secring.gpg.b64
+          base64 -d ~/.gradle/secring.gpg.b64 > ~/.gradle/secring.gpg
+
+      - name: Publish package
+        run: ./gradlew publish -Psigning.keyId=${{secrets.OSSRH_GPG_SECRET_KEY_ID}} -Psigning.password=${{secrets.OSSRH_GPG_SECRET_KEY_PASSWORD}} -Psigning.secretKeyRingFile=$(echo ~/.gradle/secring.gpg) --warn --stacktrace
+        env:
+          OSSRH_USERNAME: ${{secrets.OSSRH_USERNAME}}
+          OSSRH_PASSWORD: ${{secrets.OSSRH_PASSWORD}}