Add CI

Author: siraben

.github/workflows/build.yml

@@ -0,0 +1,24 @@
+name: Build
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-15]
+    runs-on: ${{ matrix.os }}
+
+    permissions:
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4.2.2
+      - uses: cachix/install-nix-action@v31.3.0
+      - name: Build home-manager flake configuration
+        run: |
+          nix build -L