CLI: Print TX info for Squads

[aoikurokawa]

No description provided.

[Copilot]

Pull request overview

Adds CLI support to output instruction data suitable for composing transactions in Squads, and updates CLI docs/examples to reflect current mainnet IDs/flows.

Changes:

• Add --print-tx support to update-stake-deposit-authority, including base58 instruction data printing.
• Update hardcoded withdraw_authority pubkey used by whitelisted deposit/withdraw builders.
• Update CLI README examples and add bs58 dependency (workspace + CLI crate).

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
cli/src/interceptor_handler.rs	Adds base58 instruction printing for Squads and adjusts update + whitelisted instruction construction details.
cli/README.md	Adds an example for printing the update instruction and refreshes example addresses/flags.
cli/Cargo.toml	Adds bs58 dependency via workspace.
Cargo.toml	Adds bs58 to workspace dependencies.
Cargo.lock	Lockfile update for bs58.

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