feat: Override default ion-breadcrumbs collapsed indicator

[lukasrgr]

Prerequisites

• [x] I have read the Contributing Guidelines.
• [x] I agree to follow the Code of Conduct.
• [x] I have searched for existing issues that already include this feature request, without success.

Describe the Feature Request

Adding option to overwrite the default collapsed indicator button for ion-breadcrumbs

Describe the Use Case

It lets users change the default ion-breadcrumbs collapsing indicator button

Describe Preferred Solution

<ion-breadcrumbs [maxItems]="maxItems">
 <ion-button slot="collapsed-indicator"></ion-button>
</ion-breadcrumbs>

Describe Alternatives

No response

Related Code

No response

Additional Information

No response