ci: add GitHub Actions test pipeline and GoReleaser releases for oo

Mirror eSlider/go-config: release-please for semver, tag-triggered GoReleaser
builds cross-platform oo binaries with embedded version metadata.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/release-please.yml

@@ -0,0 +1,26 @@
+name: Release Please
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    name: Release Please
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run release-please
+        uses: googleapis/release-please-action@v4
+        id: release
+        with:
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json
+          token: ${{ secrets.RELEASE_PLEASE_TOKEN != '' && secrets.RELEASE_PLEASE_TOKEN || secrets.GITHUB_TOKEN }}
+
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }}