feat: Added a chatroom component, that is navigatable by the chatroom's ID

[demos/kafka/chat] / src / app / chatrooms / chatrooms.component.html

<div class="panel panel-primary">
  <div class="panel-heading">
    <h3 class="panel-title">Please Choose a Chat-Room</h3>
  </div>
  <div class="panel-body">
    <button *ngFor="let chatroom of chatrooms" routerLink="/chatroom/{{chatroom.id}}" type="button" class="btn btn-default btn-lg btn-block">{{chatroom.name}}</button>
  </div>
</div>