Add a CI workflow to make sure this works.

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-13, macos-14, macos-15]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build
+      run: cargo build --verbose
+    - name: Tests
+      run: cargo test --verbose
+    - name: Runs on latest macOS
+      run: sudo ./target/debug/csops-bin status 1