feat: support user-defined fallback protocols array

[anubhav756]

Description

This PR introduces the ability for devs to provide a custom array of preferred protocol versions when initializing the client, rather than being forced to rely on the default SDK fallback order.

Note

This PR is stacked on top of #703.

Changes:

• Custom Protocols Array:
  • Adds an optional supported_protocols list parameter to the ToolboxClient.
• Intersection & Sorting Logic:
  • When the user provides a custom protocol array, the client computes the intersection between the user's requested versions and the SDK's natively supported versions.
  • The resulting list is strictly sorted in descending chronological order (newest to oldest).
• Unit Testing (test_client.py):
  • Added dedicated unit tests to verify the custom array initialization.
  • Added assertions to verify that arrays passed in scrambled or reversed chronological order are correctly sanitized and sorted before the transport layer attempts negotiation.