ci: add Zig 0.14.1 build and test workflow (#1863)

* ci: add Zig CI workflow

Add GitHub Actions workflow for Zig (the only supported language
without CI). Runs zig build and zig build test on ubuntu, macOS,
and Windows. Targets Zig 0.14.1 per codes/zig/build.zig.

Co-Authored-By: claude-flow <ruv@ruv.net>

* ci: use a compatible macOS image for Zig 0.14.1

---------

Co-authored-by: Santosh Maturi <santhum@amazon.com>
Co-authored-by: claude-flow <ruv@ruv.net>
Co-authored-by: krahets <krahets@163.com>

.github/workflows/zig.yml

@@ -0,0 +1,42 @@
+name: Zig
+
+on:
+  push:
+    branches: ["main"]
+    paths:
+      - ".github/workflows/zig.yml"
+      - "codes/zig/**/*.zig"
+      - "codes/zig/build.zig"
+  pull_request:
+    branches: ["main"]
+    paths:
+      - ".github/workflows/zig.yml"
+      - "codes/zig/**/*.zig"
+      - "codes/zig/build.zig"
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        # Keep the macOS SDK compatible with Zig 0.14.1.
+        os: [ubuntu-latest, macos-14, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: mlugg/setup-zig@v2
+        with:
+          version: "0.14.1"
+
+      - name: Build
+        working-directory: codes/zig
+        run: zig build
+
+      - name: Test
+        working-directory: codes/zig
+        run: zig build test