Feature request - add contact & website field to indexer registration and display those on network dapp

[koen84]

I'd like to suggest that the indexer registration is expanded with optional fields for contact info & website, which would subsequently be displayed on the network dapp.

A recurring question is being able to know who an indexer is and getting in touch with them, so having contact info linked on chain could be a significant help. Some indexers might also want to list their website for being identifiable, for explaining their setup / plans, etc.