Moved assets into separate module

modules/features/assets.nix

@@ -0,0 +1,29 @@
+{
+  flake.modules.homeManager.assets =
+    { config, lib, ... }:
+    {
+      options = {
+        profilePicture = lib.mkOption {
+          type = lib.types.path;
+          default = null;
+          description = "The user's profile picture, to be used as ~/.face";
+        };
+        wallpaperDir = lib.mkOption {
+          type = lib.types.path;
+          default = null;
+          description = "The path to a directory containing wallpapers to being linked to XDG_WALLPAPERS_DIR";
+        };
+      };
+
+      config.xdg.userDirs.extraConfig.WALLPAPERS = "${config.xdg.userDirs.pictures}/Wallpapers";
+
+      config.home.file.".face".source = lib.mkIf (config.profilePicture != null) config.profilePicture;
+
+      config.home.file."${config.xdg.userDirs.extraConfig.WALLPAPERS}" =
+        lib.mkIf (config.wallpaperDir != null)
+          {
+            source = config.wallpaperDir;
+            recursive = true;
+          };
+    };
+}