CLI: Compute directed stake meta

[aoikurokawa]

• Send normal copy directed stake target ixs first

Related to #244

Testnet

./target/release/steward-cli \
    --json-rpc-url \ 
    compute-directed-stake-meta  \
    --steward-config 5pZmpk3ktweGZW9xFknpEHhQoWeAKTzSGwnCUyVdiye \
    --authority-keypair-path ~/.config/solana/id.json \
    --kobe-api-base-url https://kobe.testnet.jito.network

Mainnet

./target/release/steward-cli \
    --json-rpc-url \
    compute-directed-stake-meta  \
    --steward-config jitoVjT9jRUyeXHzvCwzPgHj7yWNRhLcUoXtes4wtjv \
    --authority-keypair-path ~/.config/solana/id.json \
    --kobe-api-base-url https://kobe.mainnet.jito.network

[Copilot]

Pull request overview

This PR refactors the compute directed stake metadata CLI command to separately handle and send normal copy directed stake target instructions and BAM delegation instructions. The changes include updating the Kobe API client initialization to use a builder pattern and splitting the transaction flow into two distinct paths.

Key changes:

• Replaced hardcoded cluster name with configurable Kobe API base URL and updated client initialization from KobeClient to KobeApiClientBuilder
• Split instruction handling into separate normal and BAM delegation paths, each with their own configuration, printing, and transaction sending logic
• Changed transaction sending from single confirmed transaction to multiple unconfirmed transactions sent in loops

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