Visualization tool for subnets

[adlrocha]

Implement a visualization tool to help debug and showcase the operation of hierarchical consensus. Things that the visualization should show:

• Active subnets.
• Peers in each subnet.
• New blocks being minted in each subnet, i.e. the chain updates (this should show the different consensus period in each subnet).
• Checkpoints propagating between subnets.
• Cross-net transaction propagated between chains through checkpoints.

[adlrocha]

We can get some inspiration from this: https://hub.mintscan.io/ibc-network