Add linting, formatting, and CI infrastructure

- Add deadnix, nixfmt, and statix to flake inputs
- Add formatter output to flake for nix fmt support
- Add deadnix, nixfmt, statix to Home Manager packages
- Add GitHub Actions workflow for CI validation
- Add .pre-commit-config.yaml with hooks for nixfmt, deadnix, and statix
- Support x86_64-darwin in formatter

modules/hosts/nixos/kiosk-gene-desk/default.nix

@@ -1,4 +1,12 @@
-{ inputs, config, lib, pkgs, username, ... }: {
+{
+  inputs,
+  config,
+  lib,
+  pkgs,
+  username,
+  ...
+}:
+{
   imports = [
     # SD card image
     "${inputs.nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64.nix"
@@ -34,7 +42,7 @@
         # Home
         "Diagon Alley".pskRaw = "ext:psk_diagon_alley";
         # Public networks
-        "Gallery Row-GuestWiFi" = {};
+        "Gallery Row-GuestWiFi" = { };
         "LocalTies Guest".pskRaw = "ext:psk_local_ties";
       };
       secretsFile = "${config.sops.secrets.wifi_creds.path}";
@@ -42,28 +50,29 @@
   };
 
   nixpkgs.overlays = [
-    (final: super: {
-      makeModulesClosure = x:
-        super.makeModulesClosure (x // { allowMissing = true; });
+    (_final: super: {
+      makeModulesClosure = x: super.makeModulesClosure (x // { allowMissing = true; });
     })
   ];
 
   sdImage.compressImage = true;
 
   services = {
-    cage = let
-      kioskProgram = pkgs.writeShellScript "kiosk.sh" ''
-        WAYLAND_DISPLAY=wayland-0 wlr-randr --output HDMI-A-1 --transform 90
-        /etc/profiles/per-user/gene/bin/chromium-browser
-      '';
-    in {
-      enable = true;
-      program = kioskProgram;
-      user = "gene";
-      environment = {
-        WLR_LIBINPUT_NO_DEVICES = "1"; # boot up even if no mouse/keyboard connected
+    cage =
+      let
+        kioskProgram = pkgs.writeShellScript "kiosk.sh" ''
+          WAYLAND_DISPLAY=wayland-0 wlr-randr --output HDMI-A-1 --transform 90
+          /etc/profiles/per-user/gene/bin/chromium-browser
+        '';
+      in
+      {
+        enable = true;
+        program = kioskProgram;
+        user = "gene";
+        environment = {
+          WLR_LIBINPUT_NO_DEVICES = "1"; # boot up even if no mouse/keyboard connected
+        };
       };
-    };
     prometheus.exporters.node = {
       enable = true;
       enabledCollectors = [
@@ -108,7 +117,10 @@
   users.users.${username} = {
     isNormalUser = true;
     description = "Gene Liverman";
-    extraGroups = [ "networkmanager" "wheel" ];
+    extraGroups = [
+      "networkmanager"
+      "wheel"
+    ];
     linger = true;
   };
 
@@ -118,4 +130,3 @@
     memoryPercent = 90;
   };
 }
-