fix(callback): allow type table for cb

[loaf-scripts]

Makes it so you can pass callbacks from RegisterNUICallback etc

[jag3dagster]

The use case that you described doesn't make a lot of sense. Could you give a more complete usage example for this functionality and how you imagine it working.

[loaf-scripts]

An example would be to get a presigned URL to upload an image to Fivemanage.

Example client code:

RegisterNUICallback("getPresignedUrl", function(body, cb)
    lib.callback("getPresignedUrl", false, cb)
end)

With the latest version of ox_lib, this results in the following error:
error during NUI callback getPresignedUrl: @ox_lib/imports/callback/client.lua:77: expected argument 3 to have type 'function' (received table)

Another example would be an export that takes cb as an argument, e.g:

exports("GetData", function(cb)
    lib.callback("getData", false, cb)
end)

Currently, that would return the following error:

[jag3dagster]

Hm based on this commit 2909cb5 it looks like @thelindat is against this sort of functionality. I'll leave it up to him to decide if he thinks this use case is an exception.

[thelindat]

The explained issue doesn't really make sense since nui callbacks aren't tables; so this is really just a fix for function references (still kind of weird/unnecessary usage tbh). What actually needs to be checked here is if it's a function or a table with a __call method.