feat: add flake support

nix/hm-modules.nix

@@ -0,0 +1,45 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+
+let
+  maomaowm = pkgs.callPackage ./. { };
+in
+{
+  options = {
+    wayland.windowManager.maomaowm = {
+      enable = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+      };
+
+      settings = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+      };
+
+      autostart_sh = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+      };
+    };
+  };
+
+  config = lib.mkIf config.wayland.windowManager.maomaowm.enable {
+    home.packages = [ maomaowm ];
+
+    home.file = {
+      ".config/maomao/config.conf" = {
+        text = config.wayland.windowManager.maomaowm.settings;
+      };
+
+      ".config/maomao/autostart.sh" = {
+        text = config.wayland.windowManager.maomaowm.autostart_sh;
+        executable = true;
+      };
+    };
+  };
+}