feat: introduce treefmt and fmt all

nix/os/devices/steveej-t14/pkg.nix

@@ -1,14 +1,7 @@
+{ pkgs, ... }:
 {
-  pkgs,
-  lib,
-  repoFlake,
-  nodeFlake,
-  ...
-}: {
   system.stateVersion = "23.05";
-  home-manager.users.root = _: {
-    home.stateVersion = "22.05";
-  };
+  home-manager.users.root = _: { home.stateVersion = "22.05"; };
   home-manager.users.steveej = _: {
     home.stateVersion = "22.05";
     imports = [
@@ -21,10 +14,9 @@
       })
     ];
 
-    home.sessionVariables = {};
+    home.sessionVariables = { };
 
-    home.packages = with pkgs; [
-    ];
+    home.packages = with pkgs; [ ];
   };
 
   # TODO: fix the following errors with regreet
@@ -38,26 +30,28 @@
   #
   # (regreet:505614): Gtk-WARNING **: 10:31:42.532: Theme parser warning: <data>:6:17-18: Empty declaration
   # Failed to create /var/empty/.cache for shader cache (Operation not permitted)---disabling.
-  services.greetd = let
-    # exec "${pkgs.greetd.gtkgreet}/bin/gtkgreet -l; swaymsg exit"
-    swayConfig = pkgs.writeText "greetd-sway-config" ''
-      # `-l` activates layer-shell mode. Notice that `swaymsg exit` will run after gtkgreet.
-      exec "dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY SWAYSOCK; ${pkgs.greetd.regreet}/bin/regreet; swaymsg exit"
-      bindsym Mod4+shift+e exec swaynag \
-        -t warning \
-        -m 'What do you want to do?' \
-        -b 'Poweroff' 'systemctl poweroff' \
-        -b 'Reboot' 'systemctl reboot'
-    '';
-  in {
-    enable = false;
-    settings = {
-      vt = 1;
-      default_session = {
-        command = "${pkgs.sway}/bin/sway --config ${swayConfig}";
+  services.greetd =
+    let
+      # exec "${pkgs.greetd.gtkgreet}/bin/gtkgreet -l; swaymsg exit"
+      swayConfig = pkgs.writeText "greetd-sway-config" ''
+        # `-l` activates layer-shell mode. Notice that `swaymsg exit` will run after gtkgreet.
+        exec "dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY SWAYSOCK; ${pkgs.greetd.regreet}/bin/regreet; swaymsg exit"
+        bindsym Mod4+shift+e exec swaynag \
+          -t warning \
+          -m 'What do you want to do?' \
+          -b 'Poweroff' 'systemctl poweroff' \
+          -b 'Reboot' 'systemctl reboot'
+      '';
+    in
+    {
+      enable = false;
+      settings = {
+        vt = 1;
+        default_session = {
+          command = "${pkgs.sway}/bin/sway --config ${swayConfig}";
+        };
       };
     };
-  };
 
   environment.etc."greetd/environments".text = ''
     sway