[Feature]: Add support for constructing sBTC burn transactions

[djordon]

Feature - Add support for constructing sBTC burn transactions

1. Description

1.1 Context & Purpose

An important part of the sBTC deposit-withdrawal lifecycle done by the signers is calling the stacks contracts to mint and burn sBTC. To do that, we need to support constructing stacks contract call transactions. This ticket is for adding support for constructing the sBTC burn stacks transaction.

2. Technical Details:

2.1 Acceptance Criteria:

• Given the sBTC burn contract address and the burn function interface, add support for making a properly formatted request to a stacks node for the contract call. The transaction does not need to contain a valid signature.

This ticket only relates to the "withdrawal-accept" contract call, which relates to #96.

3. Related Issues and Pull Requests (optional):

This is part of #44 and recently came up during this discussion #228 (comment).

• Withdrawal contract registry Clarity Registry Contract Withdrawal Functions #115.
• Withdrawal contract data structures [Feature]: Withdrawal contract data structures #94 Feat: initial contracts folder setup, registry structs #127.
• Stacks client ticket [Feature]: Stacks client #176.