feat: add calibre and game virtualization

modules/nixos/desktop/calibre.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+{
+  imports = [];
+
+  options = {
+    zw-calibre = {
+      enable = lib.mkEnableOption "Enable Calibre";
+    };
+  };
+
+  config = {
+    config.allowUnfreePredigate = pkg: builtins.elem (lib.getName pkg) [
+      "calibre"
+      "unrar"
+    ];
+
+    environment.systemPackages = with pkgs; [
+      (calibre.override {
+        unrarSupport = true;
+      })
+      unrar
+    ];
+
+    services.udisks2.enable = true;
+  };
+  # NOTE: Consider adding https://github.com/nydragon/calibre-plugins
+}