Update Steam Deck config

linux/protostar/locale.nix

@@ -0,0 +1,20 @@
+{ pkgs, ... }:
+
+{
+  # Configure default fonts
+  fonts = {
+    fontconfig.defaultFonts = {
+      serif = [ "Noto Serif" "WenQuanYi Zen Hei" ];
+      sansSerif = [ "Inter" "WenQuanYi Zen Hei" ];
+      monospace = [ "Iosevka" "WenQuanYi Zen Hei Mono" ];
+    };
+    packages = with pkgs; [
+      inter
+      iosevka
+      noto-fonts
+      noto-fonts-emoji
+      wqy_zenhei
+    ];
+  };
+
+}