[NEW] Breadcrumb arrow/caret component

[coreyvickery]

Breadcrumb

Requesting a color change to the light and dark theme Breadcrumb component.

Light theme update

Color change

• Arrow/caret color: #8A8D90

Example from design kit

Design kit link

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Dark theme update

Color change

• Arrow/caret color: #B8BBBE

Example from design kit

Design kit link

[castastrophe]

@coreyvickery I updated this to a new component request because there is not breadcrumb component built yet in PFE.

[coreyvickery]

@castastrophe Okay, thanks. Adam built it in WebRH, but yes, it is not a web component yet. My apologies.

[bennypowers]

Closing as duplicate of #2688, which tracks the full breadcrumb element.