Migrate to Snowfall (#1)

Reviewed-on: #1
Co-authored-by: Evan Reichard <evan@reichard.io>
Co-committed-by: Evan Reichard <evan@reichard.io>

modules/nixos/display-managers/sddm/default.nix

@@ -0,0 +1,34 @@
+{ config, lib, pkgs, namespace, ... }:
+let
+  inherit (lib) mkIf types;
+  inherit (lib.${namespace}) mkOpt;
+
+  cfg = config.${namespace}.display-managers.sddm;
+in
+{
+  options.${namespace}.display-managers.sddm = {
+    enable = lib.mkEnableOption "sddm";
+    scale = mkOpt types.str "1.75" "Scale";
+  };
+
+  config = mkIf cfg.enable {
+    services = {
+      displayManager = {
+        sddm = {
+          inherit (cfg) enable;
+          package = pkgs.kdePackages.sddm;
+          theme = "catppuccin-mocha";
+          wayland.enable = true;
+        };
+      };
+    };
+
+    environment.systemPackages = with pkgs; [
+      catppuccin-sddm
+    ];
+
+    environment.sessionVariables = {
+      QT_SCREEN_SCALE_FACTORS = cfg.scale;
+    };
+  };
+}