Improvements, AssetBundle scenes, some cleanup

[jkim-y]

• More improvements by executing events and scenes specifically on the main il2cpp thread. (Fixes to some false events occurred prior to this PR)
• Some performance improvements, less time between events, less necessary class loading, etc.
• Delete some unused code. Mainly, we are no longer using unloadScenes(), and triggerAllEvents(), which are dead RPC pipes.
• Some config cleanup.
• Updated collision triggering logic.
• Updated event triggering to also include the object handle with the function callback. what you’d see on the python side is something like: 0x12234@0x7432432, where the left content is the object handle and the right content is the method address.
• Added AssetBundle scenes. This still won’t work with BeatSaber because of their scene state manager, but you should be able to listen and execute scenes from AssetBundles.
• AsyncOperation/AsyncOperationHandle handling, allows us to operate on C# async functions .
• Some fixes with manual mode.
• Re-add scene counting manually in case the scene count APIs are stripped from the libil2cpp.so binary.