Add connect_named_pipe Method to CloudAdapter for DirectLine Speech Support

[cosineai]

This pull request addresses the need for DirectLine Speech support in the Python SDK by adding the connect_named_pipe method to the CloudAdapter class. This method is essential for enabling bots to utilize DirectLine Speech services, which was previously unsupported due to the absence of this functionality.

Changes Made:

• Introduced a new _NamedPipeClient class to handle named pipe connections.
• Added the connect_named_pipe method to the _StreamingActivityProcessor class, allowing it to establish a connection using the named pipe client.
• Updated imports to include necessary modules for named pipe operations.

These changes align the Python SDK more closely with the .NET and JavaScript SDKs, providing a more consistent experience across platforms and enabling the use of DirectLine Speech in Python-based bots. This enhancement will allow developers to leverage advanced speech capabilities in their applications.