Expand release targets and add checksums

- Added support for aarch64-unknown-linux-gnu and x86_64-apple-darwin
  build targets.
- Configured cross-compilation linker for Linux ARM64 builds.
- Implemented automated SHA256 checksum generation for release
  artifacts.
- Updated release action to include checksum files in the published
  assets.

Author: PythonicNinja

.github/workflows/release.yml

@@ -21,6 +21,11 @@ jobs:
         include:
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-gnu
+            linker: aarch64-linux-gnu-gcc
+          - os: macos-13
+            target: x86_64-apple-darwin
           - os: macos-14
             target: aarch64-apple-darwin
           - os: windows-latest
@@ -35,8 +40,20 @@ jobs:
         with:
           targets: ${{ matrix.target }}
 
+      - name: Install cross linker for Linux ARM64
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+
       - name: Build release binary
-        run: cargo build --release --locked -p trigrep-cli --bin trigrep --target ${{ matrix.target }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          if [ "${{ matrix.target }}" = "aarch64-unknown-linux-gnu" ]; then
+            export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="${{ matrix.linker }}"
+          fi
+          cargo build --release --locked -p trigrep-cli --bin trigrep --target "${{ matrix.target }}"
 
       - name: Package artifact (Unix)
         if: runner.os != 'Windows'
@@ -80,10 +97,21 @@ jobs:
         with:
           path: release-assets
 
+      - name: Create checksum file
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p dist
+          find release-assets -type f -name 'trigrep-*' -exec cp {} dist/ \;
+          cd dist
+          sha256sum trigrep-* > checksums.txt
+
       - name: Publish release
         uses: softprops/action-gh-release@v2
         with:
-          files: release-assets/**/*
+          files: |
+            dist/trigrep-*
+            dist/checksums.txt
           generate_release_notes: true
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}