refactor(imports/callback): response varargs

Trying to have scrt compatible responses gets weird when using
msgpack.

imports/callback/server.lua

@@ -24,15 +24,16 @@ local function triggerClientCallback(_, event, playerId, cb, ...)
 	---@type promise | false
 	local promise = not cb and promise.new()
 
-	events[key] = function(response)
+	events[key] = function(response, ...)
+        response = { response, ... }
 		events[key] = nil
 
 		if promise then
-			return promise:resolve(response and { msgpack.unpack(response) } or {})
+			return promise:resolve(response)
 		end
 
-        if cb and response then
-            cb(msgpack.unpack(response))
+        if cb then
+            cb(table.unpack(response))
         end
 	end
 
@@ -62,7 +63,7 @@ local function callbackResponse(success, result, ...)
 		return false
 	end
 
-	return msgpack.pack(result, ...)
+	return result, ...
 end
 
 local pcall = pcall