Refactor DMS IPC bindings for Niri and Hyprland

- Updated `binds.nix` files for both Niri and Hyprland to utilize a centralized `dmsIpcBinds` structure, improving maintainability and consistency across keybindings.
- Introduced `dmsIpcBinds` in `default.nix` for both modules to streamline the command definitions for DMS IPC calls.
- Enhanced `dms` module to define shared IPC commands, ensuring uniform command formatting for different compositors.

modules/desktop/hyprland/binds.nix

@@ -1,6 +1,6 @@
 { ... }: {
   flake.lib.hyprlandBinds =
-    { lib, dmsEnabled ? false }:
+    { lib, dmsEnabled ? false, dmsIpcBinds }:
     let
       workspaceBinds =
         (builtins.map (i: "Super, ${toString i}, workspace, ${toString i}") (builtins.genList (n: n + 1) 9))
@@ -28,17 +28,15 @@
           "Super, Equal, splitratio, 0.1"
           "AltSuper, Space, togglefloating"
           "Super, P, pin"
-        ]
-        ++ lib.optionals dmsEnabled [
-          "Super, Space, exec, dms ipc call spotlight toggle"
-          "Super, I, exec, dms ipc call settings focusOrToggle"
-          "Super, N, exec, dms ipc call notepad toggle"
-          "ShiftSuper, N, exec, dms ipc call notifications toggle"
-          "Super, M, exec, dms ipc call processlist focusOrToggle"
-          "Super, L, exec, dms ipc call lock lock"
-          "ShiftSuper, V, exec, dms ipc call clipboard toggle"
-        ]
-        ++ [
+        ]        ++ lib.optionals dmsEnabled [
+          "Super, Space, exec, ${dmsIpcBinds.spotlight}"
+          "Super, I, exec, ${dmsIpcBinds.settingsFocus}"
+          "Super, N, exec, ${dmsIpcBinds.notepad}"
+          "ShiftSuper, N, exec, ${dmsIpcBinds.notifications}"
+          "Super, M, exec, ${dmsIpcBinds.processlistFocus}"
+          "Super, L, exec, ${dmsIpcBinds.lock}"
+          "ShiftSuper, V, exec, ${dmsIpcBinds.clipboard}"
+        ] ++ [
           "Super, Tab, cyclenext"
           "Super, Tab, bringactivetotop"
           "Super, left, movefocus, l"