Mock UI to allow user to create a Provider

As a provider I want to declare which networks I support and the specific endpoints of that network.

wizard ui to

select networks from a known list
For each network
- choose the rpc methods
Review choices
create on chain contract for NetworkProviders and Provider contract.

definitions

Provider is contract to represent a DIN provider partner. NetworkProvider represents a subset of methods Provider --1---------n-> NetworkProvider

DIN-center / din-sc

Mock UI to allow user to create a Provider #6

definitions