update github workflow to automatically publish to curseforge

.github/workflows/publish.yml

@@ -29,3 +29,19 @@ jobs:
           GITHUB_TOKEN: ${{ github.token }}
         with:
           asset_paths: '["./build/libs/*.jar"]'
+
+      - name: Set release type to 'release'
+        run: |
+          echo "CURSEFORGE_RELEASE_TYPE=release" >> $GITHUB_ENV
+        if: github.event.release.prerelease == false
+      - name: Set release type to 'alpha'
+        run: |
+          echo "CURSEFORGE_RELEASE_TYPE=alpha" >> $GITHUB_ENV
+        if: github.event.release.prerelease == true
+
+      - name: Publish to Curseforge
+        run: ./gradlew -Psemver='${{ steps.split_tag.outputs._1 }}' curseforge
+        env:
+          CURSEFORGE_API_KEY: ${{ secrets.CURSEFORGE_API_KEY }}
+          CURSEFORGE_RELEASE_TYPE: ${{ env.CURSEFORGE_RELEASE_TYPE }}
+          CHANGELOG: ${{ github.event.release.body }}