feat: update GitHub workflows to improve structure and add flake checks

.github/workflows/build-nano.yaml

@@ -5,7 +5,7 @@ on:
   - workflow_dispatch
 jobs:
   call-workflow-passing-data:
-    uses: ./.github/workflows/build-macos.yaml
+    uses: ./.github/workflows/templates/build-macos.yaml
     with:
       hostname: nano
     secrets: inherit

.github/workflows/deadnix.yaml

@@ -8,13 +8,19 @@ jobs:
     name: Deadnix
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v15
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Check flake.lock file
+        uses: DeterminateSystems/flake-checker-action@main
+      - name: Install nix and flakes
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Use magic nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Use cachix nix cache
+        uses: cachix/cachix-action@master
         with:
           name: deadnix
-      - uses: astro/deadnix-action@main
+      - name: Run deadnix
+        uses: astro/deadnix-action@main
         with:
           commit_message: "chore: remove dead code"

.github/workflows/statix.yaml

@@ -8,11 +8,17 @@ jobs:
     name: Linting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v15
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Check flake.lock file
+        uses: DeterminateSystems/flake-checker-action@main
+      - name: Install nix and flakes
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Use magic nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Use cachix nix cache
+        uses: cachix/cachix-action@master
         with:
           name: statix
-      - uses: jocelynthode/statix-action@master
+      - name: Run statix
+        uses: jocelynthode/statix-action@master