Integrate cosmjs functionality as local dependency

[Unique-Divine]

Purpose

[Add more info]

The Ask

• Start with a git submodule and get the CI working as a GitHub workflow.

[cgilbe27]

https://github.com/sei-protocol/sei-js/tree/main/packages/cosmjs

[cgilbe27]

Start with CosmWasmSigningClient account parser extension

NibiCosmWasmSigningClient extends CosmWasmSigningClient {
accountParser; () => {}
}