Rust client library

[iboss-ptk]

Background

osmosis-std generate code from proto, which means it can generate non-cosmwasm client with nice interface along with it. The idea is to have an interface similar to #22 as a starting point, but could find better interface along the way.

Expectation

• Design interface for GammQueryClient ,GammClient
• potentially construct these client from root struct
• implement the interface and create example
• repo refactoring (need feedback)
  • osmowasm: cosmwasm related lib
    • osmowasm-std
    • osmowasm-std-derive
    • osmoswasm-testing
  • osmo-rs
  • cosmos-bindgen (used for gen osmo-rs & osmowasm-std)