nixosModules/style: add regreet config

shared/nixosModules/style/modules/regreet.nix

@@ -0,0 +1,21 @@
+{
+  lib,
+  config,
+  ...
+}: let
+  cfg = config.local.style;
+in {
+  config.programs.regreet = lib.mkIf cfg.enable {
+    theme = {
+      inherit (cfg.gtk.theme) name package;
+    };
+
+    cursorTheme = {
+      inherit (cfg.cursorTheme) name package;
+    };
+
+    iconTheme = {
+      inherit (cfg.gtk.iconTheme) name package;
+    };
+  };
+}