Create release workflow in GitHub Actions

.github/workflows/release.yml

@@ -0,0 +1,78 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    name: Build ${{ matrix.target }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+          # - os: macos-latest
+          #   target: x86_64-apple-darwin
+          # - os: windows-latest
+          #   target: x86_64-pc-windows-msvc
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          targets: ${{ matrix.target }}
+
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-${{ matrix.target }}-release-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Build release
+        run: cargo build --release --workspace --target ${{ matrix.target }}
+
+      # Smoosh binaries into a .tar.gz per platform
+      - name: Package
+        shell: bash
+        run: |
+          mkdir dist
+          cp target/${{ matrix.target }}/release/placy dist/ 2>/dev/null || true
+          cp target/${{ matrix.target }}/release/placy.exe dist/ 2>/dev/null || true
+          cp target/${{ matrix.target }}/release/placy-server dist/ 2>/dev/null || true
+          cp target/${{ matrix.target }}/release/placy-server.exe dist/ 2>/dev/null || true
+          tar -czf placy-${{ github.ref_name }}-${{ matrix.target }}.tar.gz -C dist .
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: placy-${{ matrix.target }}
+          path: placy-${{ github.ref_name }}-${{ matrix.target }}.tar.gz
+
+  release:
+    name: Create Release
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write       # needed to create the release
+
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: Release ${{ github.ref_name }}
+          generate_release_notes: true   # auto-generates changelog from PRs/commits
+          files: artifacts/*