WalletConnect service strategy should be injected

[gregsantos]

Services and their accompanying strategies potentially can be added to FCL via a plugin type architecture. Discovery around plugin strategy here.

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execService and existing strategies would need refactor, enhancements

[justinbarry]

Plan worked out. Need implementation.

[gregsantos]

Began implementing, now passing client discoveryServices to Discovery on authn

[JeffreyDoyle]

Closing as this is now implemented.