feat(ci): build all flake outputs to cachix

.forgejo/workflows/cachix.yml

@@ -0,0 +1,27 @@
+name: Binary Cache
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  nix:
+    name: "Build"
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: https://github.com/actions/checkout@v3
+      with:
+        submodules: recursive
+
+    - name: Setup-Nix
+      uses: https://github.com/cachix/install-nix-action@v24
+    - uses: https://github.com/yaxitech/nix-install-pkgs-action@v3
+      with:
+        packages: "nixpkgs#nixci"
+    - uses: https://github.com/cachix/cachix-action@v12
+      with:
+        name: archives
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
+    - name: Build configs
+      run: |
+        nixci

common/modules/cachix.nix

@@ -14,6 +14,8 @@
         "https://viperml.cachix.org"
         # Caddy
         "https://caddycf.cachix.org"
+        # Personal config cache
+        "https://archives.cachix.org"
       ];
       trusted-public-keys = [
         "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
@@ -27,6 +29,8 @@
         "viperml.cachix.org-1:qZhKBMTfmcLL+OG6fj/hzsMEedgKvZVFRRAhq7j8Vh8="
         # Caddy
         "caddycf.cachix.org-1:6vbQaeiec/zKv9XfEwi9yWVCe7opbeJMu6w81UEXugY="
+        # Personal config cache
+        "archives.cachix.org-1:6fvCc0qfKnnYVUmNw0TeT4qH/ZNAGLOzw7SlgWN5bV0="
       ];
     };
   };