Issue 772 proxy send reverse direction

[kiranlahiri]

Introduce changes to the Proxy class to enable bidirectional handling of control packets, which was not previously supported.

Added a control endpoint (receiver_control_endp_) to manage control packets.
Update to handle and route control packets appropriately using a new control queue (control_queue_).
Enhanced configuration to bind control endpoints during Proxy initialization

Add test case ProxyWithControlEndpoint that validates the following

• Initialization of Proxy with source, repair, and control endpoints.
• Routing and handling of control packets via the Proxy class.
• Integration of control packets into the real-time streaming workflow.

[github-actions]

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[gavv]

Hi, thanks for the patch.

1. Please rebase and retarget your PR on develop branch, see contribution guidelines.

2. There is no need to create a new test file, we already have test_loopback_sender_2_receiver.cpp.

3. Can you tell me how you created this patch, did you ask an LLM to write it entirely or partially? I'm just curious.

   The code in ProxyWithControlEndpoint uses nonexistent API like roc_proxy and shouldn't compile. The test needs to be rewritten in line with the other tests and needs to use test::Context, test::Receiver, etc, instead of using roc_context, roc_receiver, etc.

I haven't looked into the code very closely yet, as it obviously needs major edits.