Dynamic Requests should double buffer shared content

[AmmarkoV]

Dynamic requests wait for a callback to complete and then send back the content for shared content with a callback cooldown , I should implement double buffering of content to make sure that they get serviced instantly instead of blocking the requests until the new content is ready..!

https://github.com/AmmarkoV/AmmarServer/blob/master/src/AmmServerlib/cache/dynamic_requests.c#L16