Extend and Reorganize queries/ibc.ts

[ethanfrey]

The file was copied over from @cosmjs as a starting point, but the organization doesn't match what we need. It only has about half the exposed queries as well.

I propose:

1. Use queryRawProof in the verified queries and make a separate subsection for them (eg. ibc.proofs). clientStateWithProof should also go in there (which is more of what we will want)
2. Remove the unverified namespace (that is default), and reorganize them. Some ideas: ibc.clientState(), client.clientState(), ibc.client.clientState(). Or if you really want to rename them to remove stutter: ibc.client.state() - these all would call clientQueryService.ClientState()
3. Add all the other grpc queries listed in the various codec/ibc/core/*/queries.ts files as direct grpc queries following whatever format you choose in 2