flake: add alejandra to devShell

this way I know what to toggle if I want to switch it off in the future

flake.nix

@@ -179,11 +179,18 @@
         };
       };
     }
-    // inputs.flake-utils.lib.eachDefaultSystem (system: {
+    // inputs.flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = import nixpkgs {inherit system;};
+    in {
       packages =
         inputs.flake-utils.lib.flattenTree
         (import ./pkgs {
           pkgs = import nixpkgs {inherit system;};
         });
+      devShells.default = pkgs.mkShellNoCC {
+        buildInputs = [
+          pkgs.alejandra
+        ];
+      };
     });
 }

hosts/talos/default.nix

@@ -44,7 +44,10 @@
   networking.domain = "alarsyo.net";
   # Pick only one of the below networking options.
   # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
-  networking.networkmanager.enable = true; # Easiest to use and most distros use this by default.
+  networking.networkmanager = {
+    enable = true;
+    wifi.powersave = true;
+  };
 
   # Set your time zone.
   time.timeZone = "Europe/Paris";