Create live network stats page for validators

[kasumi-1]

We have a start of this on the explorer page, but it would be nice to have something specific to validators which:

• showed all active validators and how many solutions and claims they are solving
• how much validators are claiming
• if there has been any contestations by or against a validators solutions

This could be implemented similarly to explorer page with just an event listener updating the stats

[kasumi-1]

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