Examine existing checks widget

In #444459 (closed) there were two threads raised about the merge/checks widget and how it could potentially communicate more than it's current binary pass/fail.

• Discussion 1: #444459 (comment 1894786584)
• Discussion 2: #444459 (closed)MR_-Overview_tab-_Default.png#note_1892346094

It's worth exploring this concept more as we look at improvements to the main merge widget and potentially consolidate into a single widget.