Create Squid Client

[danielsimao]

Is your feature request related to a problem? Please describe.
We should aggregate all queries in one place so they are easier to maintain and also easy to mock

Describe the solution you'd like
A GraphQLClient class that would have a field for each module. A module could be LoanService a class that contains for example a getUserEarnings

class GraphQLClient {
 constructor() {
   loans = new LoanService(...)
 }
loans: LoanService
}

class LoanService {
 constructor(graphQLClient: any) {
...
}

 getUserEarnings: async () => graphQLClient.request(SOME_QUERY)
}