shared: Add class-based events utils

[xxshady]

const localEvent = new alt.Utils.LocalEvent("test", (...args) => {})
localEvent.destroy()
const genericLocalEvent = new alt.Utils.GenericLocalEvent((eventName, ...args) => {})
genericLocalEvent.destroy()

[LeonMrBonnie]

Let's not get too overboard with the "everything has to be OOP" mindset

[xxshady]

ok