fix: update dees-wcctools dependency to version 1.2.0; adjust workspace dependencies and refactor demo function

ts_web/elements/dees-toast.demo.ts

@@ -2,8 +2,7 @@ import { html, css, cssManager } from '@design.estate/dees-element';
 import { DeesToast } from './dees-toast.js';
 import './dees-button.js';
 
-export const demoFunc = async () => {
-  return html`
+export const demoFunc = () => html`
     <style>
       .demo-container {
         padding: 32px;
@@ -259,4 +258,3 @@ export const demoFunc = async () => {
       </div>
     </div>
   `;
-};