feat: add serpantinum shell

modules/hm/desktop/serpantinum.nix

@@ -0,0 +1,70 @@
+{ inputs, ... }: {
+
+  flake.modules.nixos.desktop = {
+    imports = [
+      inputs.serpantinum.nixosModules.default
+    ];
+
+    programs.serpantinum.enable = true;
+  };
+
+  flake.modules.homeManager.desktop = { pkgs, ... }: {
+    imports = [
+      inputs.serpantinum.homeManagerModules.default
+    ];
+
+    home.packages = with pkgs; [ pulseaudioFull ];
+
+    programs.serpantinum = {
+      enable = true;
+      systemd.enable = true;
+
+      settings = {
+        wallpaperDir = "/home/tux/Wallpapers";
+
+        general = {
+          language = "en";
+          weatherUnit = "metric";
+          weatherInterval = 30;
+        };
+
+        bar = {
+          position = "top";
+          style = "modular";
+          width = 5;
+          workspaceCount = 7;
+          modules = {
+            left = [
+              "left"
+              "workspaces"
+              "sysmon"
+              "wifi"
+            ];
+            center = [ "vis" ];
+            right = [
+              [
+                "media"
+                "vol"
+                "bat"
+                "tray"
+                "timedate"
+              ]
+            ];
+          };
+        };
+
+        theme = {
+          fontFamily = "JetBrains Mono SemiBold";
+          borderRadius = 12;
+          matugen = true;
+        };
+
+        notifications = {
+          dnd = false;
+          position = "top right";
+          sound = true;
+        };
+      };
+    };
+  };
+}