add cross-platform release CI workflow

Author: rs545837

.github/workflows/release.yml

@@ -0,0 +1,76 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        include:
+          - target: aarch64-apple-darwin
+            os: macos-latest
+          - target: x86_64-apple-darwin
+            os: macos-13
+          - target: x86_64-unknown-linux-gnu
+            os: ubuntu-latest
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-latest
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Install cross-compilation tools (aarch64 Linux)
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+
+      - name: Build weave-mcp
+        run: cargo build --release --target ${{ matrix.target }} --bin weave-mcp
+
+      - name: Build weave-cli
+        run: cargo build --release --target ${{ matrix.target }} --bin weave
+
+      - name: Package binaries
+        run: |
+          mkdir -p dist
+          cd target/${{ matrix.target }}/release
+
+          tar czf ../../../dist/weave-mcp-${{ matrix.target }}.tar.gz weave-mcp
+          tar czf ../../../dist/weave-cli-${{ matrix.target }}.tar.gz weave
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: binaries-${{ matrix.target }}
+          path: dist/
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+          merge-multiple: true
+
+      - name: Create release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: dist/*
+          generate_release_notes: true