add github action for release builds

.github/workflows/release-build.yaml

@@ -0,0 +1,70 @@
+name: Build and Release R Package
+
+on:
+  release:
+    types: [created]
+  workflow_dispatch:  # Add this for manual trigger
+
+jobs:
+  build:
+    name: Build R Package
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Setup R environment
+      uses: r-lib/actions/setup-r@v2
+      with:
+        r-version: "latest"
+
+    - name: Install pak
+      run: Rscript -e 'install.packages("pak", repos = "https://r-lib.github.io/p/pak/dev/")'
+
+    - name: Install dependencies
+      run: Rscript -e 'pak::pkg_install()'
+
+    - name: Build package
+      run: R CMD build .
+
+    - name: Create binary package
+      run: |
+        if [ "${{ matrix.os }}" == "windows-latest" ]; then
+          R CMD INSTALL --build .
+        else
+          R CMD INSTALL --build --binary .
+        fi
+
+    # Temporary step for testing to upload the artifact
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: interlacer-${{ matrix.os }}
+        path: "*.tar.gz"
+
+  release:
+    if: github.event_name == 'release'  # Only run this on real releases
+    name: Attach built packages to release
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Download built assets
+      uses: actions/download-artifact@v3
+      with:
+        name: interlacer-${{ matrix.os }}
+        path: ./dist/
+
+    - name: Upload assets to GitHub Release
+      uses: actions/upload-release-asset@v1
+      if: github.event_name == 'release'
+      with:
+        upload_url: ${{ github.event.release.upload_url }}
+        asset_path: ./dist/
+        asset_name: "interlacer-${{ matrix.os }}.tar.gz"
+        asset_content_type: application/gzip
+