ci: add CI and release workflows

- CI: check, test, clippy, format on push/PR to main
- Release: cross-compile for linux x86_64/aarch64 + macOS x86_64/aarch64,
  generate man pages, create GitHub release with binaries on tag push

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sionsmith

.github/workflows/ci.yml

@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo check --workspace
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo test --workspace
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --workspace -- -D warnings
+
+  fmt:
+    name: Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - run: cargo fmt --all -- --check

.github/workflows/release.yml

@@ -0,0 +1,94 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+permissions:
+  contents: write
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    name: Build ${{ matrix.target }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - target: x86_64-unknown-linux-gnu
+            os: ubuntu-latest
+            artifact: wpx-linux-x86_64
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-latest
+            artifact: wpx-linux-aarch64
+          - target: x86_64-apple-darwin
+            os: macos-latest
+            artifact: wpx-darwin-x86_64
+          - target: aarch64-apple-darwin
+            os: macos-latest
+            artifact: wpx-darwin-aarch64
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.target }}
+
+      - name: Install cross-compilation tools
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+
+      - name: Build
+        run: cargo build --release --target ${{ matrix.target }}
+        env:
+          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+
+      - name: Package
+        run: |
+          mkdir -p dist
+          cp target/${{ matrix.target }}/release/wpx dist/${{ matrix.artifact }}
+          chmod +x dist/${{ matrix.artifact }}
+          tar czf dist/${{ matrix.artifact }}.tar.gz -C dist ${{ matrix.artifact }}
+
+      - name: Generate man pages
+        if: matrix.target == 'x86_64-unknown-linux-gnu'
+        run: |
+          mkdir -p dist/man
+          cargo run --release --target ${{ matrix.target }} -- man --dir dist/man
+          tar czf dist/wpx-man-pages.tar.gz -C dist/man .
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact }}
+          path: dist/*.tar.gz
+
+  release:
+    name: Release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release create ${{ github.ref_name }} \
+            --title "wpx ${{ github.ref_name }}" \
+            --generate-notes \
+            artifacts/*.tar.gz