Provide library to facilitate CosmWasm contract implementation for light clients built using ibc-rs

[Farhad-Shabani]

Summary

The goal is to integrate a library into ibc-rs that includes essential common definitions and utilities, ready-made to facilitate the implementation of CosmWasm contracts for light clients built using ibc-rs.

This initiative is inspired by our experience in implementing the CosmWasm contract for Sovereign SDK light client.

This library, when added to ibc-rs, will provide users with a comprehensive Context object. This context will have all the necessary methods and client-level traits already implemented and intended to be compatible with any light clients developed using ibc-rs.

Prerequisite

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1. Make custom Validation/ExecutionContext under ICS-07 portable cosmos/ibc-rs#1163
   O: usability +1