Add test templates workflow

.github/workflows/test-templates.yml

@@ -0,0 +1,32 @@
+name: "Test Templates"
+on:
+  pull_request:
+  push:
+jobs:
+  nightly:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - name: Setup Directory
+      working-directory: ./nightly
+      run: nix flake init -t github:mrshmllow/tolerable-nvim-nix#nightly
+    - name: Build
+      working-directory: ./nightly
+      run: nix build .#neovim
+  stable:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - name: Setup Directory
+      working-directory: ./stable
+      run: nix flake init -t github:mrshmllow/tolerable-nvim-nix#stable
+    - name: Build
+      working-directory: ./stable
+      run: nix build .#neovim
+