Batch Transfer Smart Contract

[ToyinB]

Overview
This pull request introduces a Batch Transfer Smart Contract implementing the SIP-010 trait. The contract allows users to perform multiple token transfers in a single transaction, enhancing efficiency and reducing transaction costs.

Key Features:

Batch Transfers: Execute multiple transfers with a single function call, supporting up to 50 recipients.
Transfer Validation: Ensures sufficient balance, checks recipient restrictions, and validates transfer amounts.
Fee Management: Implements a customizable transaction fee structure with rate limits and treasury management.
Transaction History: Maintains detailed logs of all transfers, including sender, amount, and status.
Security Measures: Includes nonce checks to prevent duplicate transactions, and manages restricted and privileged addresses.
Operational Controls: Allows the administrator to pause contract functions, adjust fee rates, and manage address permissions.
Event Emission: Emits events for each transfer for transparency and tracking.
Error Handling:
Comprehensive error constants define potential failure scenarios, ensuring clear feedback during transaction processing.
This contract enhances usability for token transfers while ensuring security and compliance through rigorous checks and balances.