Improve presets and configuration settings

[njokuScript]

Overview

The current presets lack flexibility and comprehensive coverage for various environments.
This issue proposes an enhancement to the presets and configuration settings to better accommodate different use cases and improve the overall user experience.

Proposed Changes

The proposed changes involve refining and expanding the existing presets in Descent.create({}) to better cater to different scenarios. Additionally, we will introduce improvements to the configuration settings to enhance customization.

Updated Presets:

browser:

• Use this preset when employing the library in a browser environment.
• It will attempt to connect using window.ethereum or window.web3.

https:

• Connect to a JSON-RPC node.
• Requires the URL to be set in the options.

test:

• Use a local node (e.g., Ganache) running at http://127.0.0.1:2000/.
• Sign transactions using node-managed keys.