Currently all of the queries for different SDK modules live under a single gaiacli query command. This can cause some query methods to have very long names to avoid namespace collisions. See PR #2569.

This proposal is that we move the query commands for each module into into a sub command of query. This also has the advantage of making all the query commands very human readable and understandable:

• gaiacli (binary)
• query (verb)
• staking (module)
• unbonding-delegations (method)

We might also want to think about reworking the gaiacli tx tree the same way. Thoughts @cwgoes @fedekunze @alexanderbez?