add separate calibre cache action

.github/workflows/cache-nixos-calibre.yaml

@@ -0,0 +1,28 @@
+name: cachix-nixos
+on:
+  pull_request:
+  push:
+jobs:
+  cachix:
+    runs-on: ubuntu-latest
+    steps:
+      # - name: Set Swap Space
+      #   uses: pierotofy/set-swap-space@master
+      #   with:
+      #     swap-size-gb: 0.1
+      # - name: Free Disk Space
+      #   uses: jlumbroso/free-disk-space@main
+      #   with:
+      #     tool-cache: true
+      - name: Checkout
+        uses: actions/[email protected]
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Magic Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: cachix/cachix-action@v14
+        with:
+          name: zachcoyle
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+      - run: nix build .#nixosConfigurations.nixos-laptop.pkgs.calibre --show-trace
+        continue-on-error: true