Rujira secured withdraw

[snoyberg]

I was doing some experimentation on stagenet with secured assets, and wanted to be able to withdraw to an external chain. This implements a working flow based on some manual testing.

[Copilot]

Pull Request Overview

This PR introduces a secured-withdraw flow for Rujira assets by defining new Protobuf message types, a MsgDeposit wrapper for withdrawals, and wiring it into the CLI and transaction builder.

• Define internal Protobuf messages (MsgDepositInner, RujiraCoin, RujiraAsset) and public MsgDeposit struct
• Implement From<MsgDeposit> → TxMessage encoding logic with description and memo
• Add withdraw subcommand in cosmos-bin and display the memo/messages in the chain inspect command

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
packages/cosmos/src/rujira.rs	New Rujira Protobuf types, MsgDeposit struct, and conversion
packages/cosmos/src/lib.rs	Exported the rujira module
packages/cosmos-bin/src/rujira.rs	Added Withdraw CLI subcommand for secured asset withdrawal
packages/cosmos-bin/src/chain.rs	Extended transaction inspection to print memo and message details

Comments suppressed due to low confidence (2)

packages/cosmos/src/rujira.rs:256

• There's no unit test covering the MsgDeposit → TxMessage conversion; consider adding tests to verify the encoding, description, and memo format.

impl From<MsgDeposit> for TxMessage {

packages/cosmos/src/rujira.rs:243

• Public struct MsgDeposit lacks doc comments on its fields; consider adding /// comments for each field to document their purpose.

pub struct MsgDeposit {