add workflow to publish binaries

.github/workflows/release-binaries.yml

@@ -0,0 +1,39 @@
+name: Release Binaries
+
+permissions:
+  contents: write
+
+on:
+  release:
+    types: [published, created]
+
+jobs:
+  upload-assets:
+    name: Upload assets for ${{ matrix.target }}
+    if: startsWith(github.event.release.tag_name, 'granc-v')
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          # Linux x86_64
+          - target: x86_64-unknown-linux-gnu
+            os: ubuntu-latest
+          # macOS x86_64 (Intel)
+          - target: x86_64-apple-darwin
+            os: macos-latest
+          # macOS ARM64 (Apple Silicon)
+          - target: aarch64-apple-darwin
+            os: macos-latest
+          # Windows x86_64
+          - target: x86_64-pc-windows-msvc
+            os: windows-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build and Upload
+        uses: taiki-e/upload-rust-binary-action@v1
+        with:
+          bin: granc
+          target: ${{ matrix.target }}
+          token: ${{ secrets.GITHUB_TOKEN }}