NodeEvent, MenuItemActivatedEvent

[Alphalaneous]

Uses the Cocos Script Engine system to add new events for CCNodes and CCMenuItems. Since Geometry Dash never sets these up itself, we can make our own and use them for useful events. None of these require hooks.

NodeEvent

• Can be filtered by OnEnter, OnExit, OnEnterTransitionDidFinish, OnExitTransitionDidStart, and OnCleanup, which match their corresponding methods.
• Has helper methods in CCNode.h to add callbacks easily
• Is global in case a developer wants to listen to every time these are called (Me, I am that developer)

MenuItemActivatedEvent

• Will run when a CCMenuItem is pressed (after the callback)
• Has a helper method in CCMenuItem.h so you can add callbacks easily to menu items.

If this PR is merged and a Geode Update is prepared, it will need to be synchronized with an Alpha's Geode Utils update, or else things will break.

[dankmeme01]

this is hacky and i love it!

most of the PR looks fine to me, but there is one concern i have with ObjectDestroyedEvent. does this end up running on every CCObject ever created (and destroyed)? because there are multiple potential issues with this:

1. thread safety - it is common for things like CCImage, CCTexture2D, etc. to be created in a thread. if this event fires for those, that would likely cause UB in the current implementation, as you are not using ThreadSafeGlobalEvent
2. performance hit - going through the event machinery on every destroyed CCObject sounds like it can have real performance implications, and this will especially be worse if thread-safe events are used. would need to benchmark it by creating & deleting a huge amount of objects and comparing the time taken with & without the event being sent