Add new async_process method

[kumaranvpl]

Description

Fixes #690

Type of change

• Documentation (typos, code examples, or any documentation updates)
• Bug fix (a non-breaking change that resolves an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a fix or feature that would disrupt existing functionality)
• This change requires a documentation update

Checklist

• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• I have included code examples to illustrate the modifications

[Copilot]

Pull Request Overview

This PR adds a new asynchronous processing method to improve how async responses are handled during workflow operations. Key changes include:

• Replacing the synchronous run method with an asynchronous variant in tests.
• Introducing the async_process method in the base module to handle async responses.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
tests/runtime/ag2/test_autogen.py	Updated test to use asynchronous run method and process async response.
fastagency/base.py	Added async_process method to asynchronously handle response events.

Comments suppressed due to low confidence (1)

tests/runtime/ag2/test_autogen.py:245

• [nitpick] Consider renaming 'a_run' to a more descriptive name such as 'run_async' to better indicate its asynchronous behavior.

response = student_agent.a_run(