add: gamescope steam and fonts

nixos/system/default.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   imports = [
@@ -6,4 +6,54 @@
     ./nix
     ./power.nix
   ];
+
+  fonts = {
+    packages = with pkgs; [
+      noto-fonts
+      noto-fonts-cjk-sans
+      noto-fonts-cjk-serif
+      noto-fonts-color-emoji
+      ipaexfont
+      nerd-fonts.jetbrains-mono
+    ];
+
+    fontconfig = {
+      enable = true;
+      antialias = true;
+
+      hinting = {
+        enable = true;
+        style = "slight";
+        autohint = false;
+      };
+
+      subpixel = {
+        rgba = "rgb";
+        lcdfilter = "default";
+      };
+
+      defaultFonts = {
+        serif = [
+          "JetBrainsMono Nerd Font"
+          "Noto Serif CJK JP"
+          "Noto Serif"
+          "IPAexMincho"
+        ];
+        sansSerif = [
+          "JetBrainsMono Nerd Font"
+          "Noto Sans CJK JP"
+          "Noto Sans"
+          "IPAexGothic"
+        ];
+        monospace = [
+          "JetBrainsMono Nerd Font Mono"
+          "JetBrainsMono Nerd Font"
+          "Noto Sans Mono CJK JP"
+          "Noto Sans CJK JP"
+          "IPAexGothic"
+        ];
+        emoji = [ "Noto Color Emoji" ];
+      };
+    };
+  };
 }