refactor: rename imports

BREAKING!
Since the folder name determines the import name (i.e. lib.callbacks), use better names and lowerCamelCase.

imports/callback/client.lua

@@ -0,0 +1,54 @@
+local ServerCallbacks = {}
+
+---@param event string
+---@param delay number prevent the event from being called for the given time
+local function callbackTimer(event, delay)
+	if type(delay) == 'number' then
+		local time = GetGameTimer()
+		if (ServerCallbacks[event] or 0) > time then
+			return false
+		end
+		ServerCallbacks[event] = time + delay
+	end
+	return true
+end
+
+local function startCallback(resource, event, ...)
+	local id = math.random(0, 100000)
+	event = ('__cb_%s:%s'):format(resource, event)
+	TriggerServerEvent(event, id, ...)
+	return event..id
+end
+
+local ServerCallback = table.create(0, 2)
+
+---@param resource string
+---@param event string
+---@param delay number prevent the event from being called for the given time
+--- Sends an event to the server and halts the current thread until a response is returned.
+ServerCallback.Await = function(resource, event, delay, ...)
+	if callbackTimer(event, delay) then
+		local promise = promise.new()
+		event = RegisterNetEvent(startCallback(resource, event, ...), function(response)
+			promise:resolve(response)
+			RemoveEventHandler(event)
+		end)
+		return table.unpack(Citizen.Await(promise))
+	end
+end
+
+---@param resource string
+---@param event string
+---@param delay number
+---@param cb function
+--- Sends an event to the server and triggers a callback function once the response is returned.
+ServerCallback.Async = function(resource, event, delay, cb, ...)
+	if callbackTimer(event, delay) then
+		event = RegisterNetEvent(startCallback(resource, event, ...), function(response)
+			cb(table.unpack(response))
+			RemoveEventHandler(event)
+		end)
+	end
+end
+
+return ServerCallback