feat: add prebuilt installer workflow

.github/workflows/release.yml

@@ -0,0 +1,43 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+          cache-dependency-path: backend/go.sum
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+
+      - name: Build release packages
+        run: scripts/build-release.sh
+
+      - name: Upload release assets
+        env:
+          GH_TOKEN: ${{ github.token }}
+          TAG: ${{ github.ref_name }}
+        run: |
+          if gh release view "$TAG" >/dev/null 2>&1; then
+            gh release upload "$TAG" release/*.tar.gz --clobber
+          else
+            gh release create "$TAG" release/*.tar.gz --title "$TAG" --notes "Prebuilt Linux release packages."
+          fi