Show client diversity percentage

[abcoathup]

Story

As an Ethereum cheerleader
I want to view client diversity percentages
So that I monitor that no client has more than a 2/3 share and ideally less than a 1/3 share

Background

A client with a 2/3rds majority is a really big problem because of the potential for those clients to finalise on an incorrect fork

Details

Client diversity shown as a Pie chart with percentages
https://twitter.com/sproulM_/status/1440512518242197516

Acceptance criteria

Quickly and easily see if any client has a greater than 1/3 share or in the danger zone of 2/3 share