Python: [Feature]: Support async credentials in `FoundryToolbox`

[cecheta]

Description

FoundryToolbox currently only supports sync credentials. Request to add support for both sync and async credentials.

Code Sample

from agent_framework_foundry_hosting import FoundryToolbox
from azure.identity.aio import AzureCliCredential

async with (
    AzureCliCredential() as credential,
    FoundryToolbox(
        credential,
    ) as toolbox,
): ...

Language/SDK

Python