Added CI

Author: johannwagner

.github/workflows/nix.yaml

@@ -0,0 +1,17 @@
+name: Nix actions
+
+on:
+  pull_request:
+  push:
+    branches:
+    - main
+
+jobs:
+  nix-build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+    - name: Build Package
+      run: nix build .\#rucli

flake.nix

@@ -36,6 +36,5 @@
       inherit (pkgs) rucli;
       default = packages.rucli;
     };
-    legacyPackages = pkgs;
   });
 }