Misc: Add nixfmt-tree and run nix fmt

modules/services/backlight.nix

@@ -1,5 +1,6 @@
 { inputs, ... }: {
-  flake.modules.homeManager.backlight = { pkgs, ... }:
+  flake.modules.homeManager.backlight =
+    { pkgs, ... }:
     let
       brightnessctl = "${pkgs.brightnessctl}/bin/brightnessctl";
     in

modules/services/borgmatic.nix

@@ -1,10 +1,11 @@
 {
   flake.modules.homeManager.borgmatic =
-    { config
-    , osConfig
-    , pkgs
-    , lib
-    , ...
+    {
+      config,
+      osConfig,
+      pkgs,
+      lib,
+      ...
     }:
     let
       hostname = osConfig.networking.hostName;

modules/services/networkmanager.nix

@@ -1,7 +1,7 @@
 {
-	flake.modules.nixos.networkmanager = {
-		networking.networkmanager = {
-			enable = true;
-		};
-	};
+  flake.modules.nixos.networkmanager = {
+    networking.networkmanager = {
+      enable = true;
+    };
+  };
 }