feat(callbacks): latent callbcks

[someone005]

Add latent version of functions:

• lib.callback -> lib.callback.latent
• lib.callback.register -> lib.callback.registerLatent
• lib.callback.await -> lib.callback.latentAwait

Idea from issue #651

[thelindat]

The original plan was to check the size of the payload and use latent events automatically if deemed too large.

Unfortunately latent events have had a number of issues and numerous cfx devs have recommended against their usage. Last I asked they were still discouraged but I need to confirm if they work or not; last I heard there was a memory issue, but that's still preferable to network hitches.

Lastly, if and when I implement this I intend to work on a new RPC class to supersede callbacks.