swapped Apollo Client with graph-client

[ayechanst]

graph-client-pr.mov

Description

The GreetingsTable.tsx component was using ApolloClient, so I made a new hook that uses graph-client called useGraphClient. The hook takes in a query and calls the execute function from the index.ts file generated by the command yarn graphclient build. I also removed traces of Apollo Client within the ScaffoldEthAppWithProviders.tsx. Please ask me questions and/or recommendations/ fixes to my code

Additional Information

• [yes ] I have read the contributing docs (if this is your first contribution)
• [yes ] This is not a duplicate of any existing pull request

Related Issues

Closes #{issue number}

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