[Feature] Enable ens

[shahankhatch]

Feature Description

Currently, hex is displayed for addresses, making it hard to identify who an address belongs to, or to choose an identity.

This issue should address two proposed changes:

• show ens names instead of addresses, e.g., leaderboard
• allow ens name entry instead of an address on the delegate page

Perhaps a more compact approach makes sense towards the above:

• js function that, when supplied with an address, returns the ens name
• js function that, when supplies with an ens name, returns the address

Although there may be existing libraries for the above proposed js functions, we need to ensure that the address type/format matches the one currently in use.