refactor: make the whole thing more generic

modules/home-manager/desktops/hyprland/ags/scss/common/menu.scss

@@ -0,0 +1,29 @@
+window.popup {
+  > * {
+    border: none;
+    box-shadow: none;
+  }
+
+  menu {
+    border-radius: $popover-radius;
+    background-color: $bg-color;
+    padding: $popover-padding;
+    border: $border-width solid $popover-border-color;
+
+    separator {
+      background-color: $border-color;
+    }
+
+    menuitem {
+      @include button;
+      padding: $spacing/2;
+      margin: $spacing/2 0;
+      &:first-child {
+        margin-top: 0;
+      }
+      &:last-child {
+        margin-bottom: 0;
+      }
+    }
+  }
+}