Ng-zorro-antd: Ability to have badges appear on menu icons

[KevinStirling]

What problem does this feature solve?

Currently the menu does allow you to add a badge to an icon, but it breaks the formatting of the collapsed and expanded view of the menu. It would be nice to be able to show badges in the side menu of an application. An example of the problem :

https://stackblitz.com/edit/badge-in-menu-demo

Screenshots

collapsed view

expanded view

What does the proposed API look like?

Being able to wrap the anticon object in the <nz-badge [nzCount]="5"> tag like so:

<li nz-submenu [(nzOpen)]="openMap.sub1" (nzOpenChange)="openHandler('sub1')">
    <span title>
             <nz-badge [nzCount]="5">
                     <i class="anticon anticon-upload"></i>
              </nz-badge>
              <span>My Data</span>
     </span>
</li>

[churanov]

<li nz-submenu *ngIf="isAnyItem$ | async">
  <span title>
    <i nz-icon nzType="plus" nzTheme="outline"></i>
    <span>New</span>
    <nz-badge [nzCount]="totalEditedItems$ | async"  [nzStyle]="{transform: 'translate(15%, -25%)'}"
            ></nz-badge>
  </span>
</li>