chore(ci): Build using Nix

.github/workflows/nix.yaml

@@ -0,0 +1,24 @@
+name: "CI Nix"
+on:
+  # Run only when pushing to main branch, and making PRs
+  push:
+    branches:
+      - main
+  pull_request:
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-14]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+        with:
+          extra-conf: |
+            trusted-public-keys = cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
+            substituters = https://cache.garnix.io?priority=41 https://cache.nixos.org/
+      - uses: yaxitech/nix-install-pkgs-action@v3
+        with:
+          packages: "github:srid/nixci"
+      - run: nixci build