feat: batch transfer

[chandrabosep]

Description: Implemented Batch Transfer Functionality

Added batchTransferCommand function to handle batch transfers.

• Validates input batch file and wallet existence.
• Verifies sufficient funds in the wallet before processing each transaction.
• Handles multiple batch transactions sequentially, ensuring that each transfer meets the wallet balance requirements.
• Provides user-friendly output messages with transaction status, including successful confirmations and failure cases.
• Improves error handling for common issues like invalid batch data, insufficient funds, or missing wallet.

Example Usage:

bun run batch --testnet --file ./batch.json

Batch File Format (batch.json):

[
  {
    "to": "0xA9ab8933Ff0467D51d13ea2bFECD81504Fc6f15a",
    "value": 0.000000001
  },
  {
    "to": "0xC0d2F97e6Bec1C04dA1188abA6F006AA4d04EEDC",
    "value": 0.000000002
  }
]

This file contains an array of transactions with recipient addresses (to) and the amounts to transfer (value) in tRBTC.

Short Description:

Implemented a batch transfer command that allows users to send multiple transactions in one batch, ensuring sufficient funds and wallet validation before processing, with clear output and error handling for each transaction.

Example:

Batch File (batch.json):