ci: Build release binaries by OS in GHA

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+name: 'Release binaries'
+
+on:
+  push:
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ${{ matrix.vm }}
+    strategy:
+      matrix:
+        include:
+          - name: linux
+            vm: ubuntu-latest
+          - name: macosx
+            vm: macos-latest
+          - name: windows
+            vm: windows-latest
+    steps:
+      - uses: 'actions/checkout@v4'
+      - name: 'Build'
+        run: cargo build --release
+      - run: |
+          ls -l target/release
+      - name: 'Make archive (*nix)'
+        if: runner.os != 'Windows'
+        run: |
+          mkdir -p ${{ env.archive_dir }}
+          cp README.md LICENSE target/release/gazer ${{ env.archive_dir }}
+          ls -lR dist
+        env:
+          archive_dir: 'dist/gazer-${{ github.ref_name }}_${{ matrix.vm }}'
+      - name: 'Make archive (Windows)'
+        if: runner.os == 'Windows'
+        run: |
+          mkdir -p ${{ env.archive_dir }}
+          Copy-Item -Path README.md,LICENSE,target/release/gazer.exe -Destination ${{ env.archive_dir }}
+          ls -l dist
+        env:
+          archive_dir: 'dist/gazer-${{ github.ref_name }}_${{ matrix.vm }}'