[IMP] theme_treehouse: update the theme

This commit updates the theme to improve the design with new colors, new
pictures and new snippet customizations.

task-2542281

X-original-commit: e18a0ff128
Part-of: odoo/design-themes#501

theme_treehouse/static/src/js/tour.js

@@ -1,8 +1,6 @@
-odoo.define("theme_treehouse.tour.treehouse", function (require) {
-"use strict";
+/** @odoo-module */
 
-const wTourUtils = require("website.tour_utils");
-var tour = require("web_tour.tour");
+import wTourUtils from 'website.tour_utils';
 
 const snippets = [
     {
@@ -39,4 +37,3 @@ wTourUtils.registerThemeHomepageTour("treehouse_tour", [
     wTourUtils.changeBackgroundColor(),
     wTourUtils.selectColorPalette(),
 ]);
-});