Misc: Add nixfmt-tree and run nix fmt

modules/system-settings/intel-gpu.nix

@@ -1,15 +1,15 @@
 {
-	flake.modules.nixos.intel-gpu = {pkgs, ...}: {
-		boot.kernelModules = [ "kvm-intel" ];
+  flake.modules.nixos.intel-gpu = { pkgs, ... }: {
+    boot.kernelModules = [ "kvm-intel" ];
 
-		hardware.graphics = {
-			enable = true;
-			extraPackages = with pkgs; [
-				intel-media-driver
-				intel-compute-runtime
-			];
-		};
+    hardware.graphics = {
+      enable = true;
+      extraPackages = with pkgs; [
+        intel-media-driver
+        intel-compute-runtime
+      ];
+    };
 
-		environment.sessionVariables.LIBVA_DRIVER_NAME = "iHD";
-	};
+    environment.sessionVariables.LIBVA_DRIVER_NAME = "iHD";
+  };
 }

modules/system-settings/systemd-boot.nix

@@ -1,6 +1,6 @@
 {
-	flake.modules.nixos.systemd-boot = {
-		boot.loader.systemd-boot.enable = true;
-		boot.loader.efi.canTouchEfiVariables = true;
-	};
+  flake.modules.nixos.systemd-boot = {
+    boot.loader.systemd-boot.enable = true;
+    boot.loader.efi.canTouchEfiVariables = true;
+  };
 }