add selinunte (desktop gaming system)

Signed-off-by: ahuston-0 <aliceghuston@gmail.com>

systems/selinunte/configuration.nix

@@ -0,0 +1,53 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [
+    ./audio.nix
+    ./desktop.nix
+    ./fonts.nix
+    ./graphics.nix
+    ./polkit.nix
+    ./programs.nix
+    ./steam.nix
+    ./stylix.nix
+  ];
+
+  time.timeZone = "America/New_York";
+
+  # temp workaround for building while in nixos-enter
+  #services.logrotate.checkConfig = false;
+
+  networking = {
+    hostId = "9f2e1ff9";
+    firewall.enable = true;
+    useNetworkd = true;
+  };
+
+  boot = {
+    useSystemdBoot = true;
+    default = true;
+  };
+
+  i18n = {
+    defaultLocale = "en_US.utf8";
+    supportedLocales = [ "en_US.UTF-8/UTF-8" ];
+  };
+
+  sops.age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
+
+  services = {
+    flatpak.enable = true;
+    gvfs.enable = true;
+    openssh.enable = lib.mkForce false;
+  };
+
+  system.stateVersion = "25.05";
+
+  sops = {
+    defaultSopsFile = ./secrets.yaml;
+  };
+}