(desktop) Gen 473: Broke desktop default.nix down into modules, removed conditionals from users.nix, moved host-dependent logic into corresponding host folders, enabled keyd on laptop

hosts/desktop/settings.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }:
+
+{
+	system.stateVersion = "24.05"; 
+	nixpkgs.config.allowUnfree = true;
+	nix = {
+		settings = {
+			auto-optimise-store = true;
+			experimental-features = [ "nix-command" "flakes" ];
+			substituters = [ "https://nix-gaming.cachix.org" ];
+		};
+		gc = {
+			automatic = true;
+			dates = "weekly";
+			options = "--delete-older-than 7d";
+		};
+	};
+
+	environment = {
+		variables = {
+			XCURSOR_SIZE = "24";
+			PATH = "${pkgs.clang-tools}/bin:$PATH";
+		};
+		shells = with pkgs; [
+			zsh
+			bash
+		];
+	};
+
+	time.timeZone = "America/New_York";
+	i18n.defaultLocale = "en_US.UTF-8";
+}