Add APIs for corking/uncorking messages to the uws FFI bindings

[rdw-software]

While this is done by default in the uWS API, it might be useful to give more fine-grained control via an explicit corking API.

Outline: https://gist.github.com/Duckwhale/707ae8101f848de38a8f622f07ada193

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Background information:

See https://github.com/uNetworking/uWebSockets/blob/master/misc/READMORE.md#corking

And the following summary:

Corking, in the context of uWebSockets, refers to a technique used for optimizing and controlling the data flow between a server and a client. uWebSockets is a C++ library for building high-performance web servers, and it supports the WebSocket protocol for real-time communication.

Corking is a method of temporarily holding or buffering outgoing data to be sent over a connection, then flushing or sending that data as a single, larger message instead of multiple smaller ones. The process of corking and uncorking aims to reduce network overhead and improve the overall throughput by minimizing the number of TCP packets and system calls.

You should use corking when:

• You have multiple small data chunks to send over a WebSocket connection.
• You want to reduce the latency and overhead associated with sending multiple small messages.
• You aim to improve the throughput and overall performance of your application.
• You need better control over the data flow between the server and the client.