refactor(editor): Color palette updates, introduce dark mode (#6980)

Github issue / Community forum post (link here to close automatically):

---------

Co-authored-by: Mutasem <mutdmour@gmail.com>

packages/design-system/src/components/N8nMenu/Menu.vue

@@ -4,6 +4,7 @@
 			['menu-container']: true,
 			[$style.container]: true,
 			[$style.menuCollapsed]: collapsed,
+			[$style.transparentBackground]: transparentBackground,
 		}"
 	>
 		<div v-if="$slots.header" :class="$style.menuHeader">
@@ -83,6 +84,10 @@ export default defineComponent({
 			type: Boolean,
 			default: false,
 		},
+		transparentBackground: {
+			type: Boolean,
+			default: false,
+		},
 		mode: {
 			type: String,
 			default: 'router',
@@ -202,4 +207,8 @@ export default defineComponent({
 		display: none !important;
 	}
 }
+
+.transparentBackground {
+	background-color: transparent;
+}
 </style>