Split out cosmwasm workspace into new repository

[Farhad-Shabani]

Summary

We recently separated the CosmWasm crates into their own workspace to decouple them from the ibc-rs dependencies. This was necessary because the coupling was causing conflicts and complicating the management of MSRV for the ibc-rs libraries.

However, we've encountered some challenges in our release process, publishing crates, and tracking changes across multiple workspaces. To simplify maintenance, it's more practical to move the cosmwasm directory into a separate repository.

Additionally, the versioning of these two workspaces doesn't need to be synchronized. As we prepare for the ibc-rs v1 release, the CosmWasm integration might not yet be ready for a production release.