RegisterEvent anonymous functions implementation (Additionally prevent CreateEventTimer() to register the same event more than one time)

[boubouleuh]

This PR implements the usage of the function directly inside RegisterEvent() while keeping the possibility of using the function name.

MP.RegisterEvent("Test",function()
Util.LogInfo("TEST")
end)
MP.TriggerLocalEvent("Test")

This needed A LOT of changes; since I'm still a beginner in C++, there are probably a couple of issues that I would be happy to fix (can't imagine that there aren't any).

If this gets merged, it would be better to merge it before #473 to prevent conflicts regarding the DontCallOnInit variable that isn't completely removed in this PR but is in #473.

ofc, I tested every changeand it seemed to work well (im just not sure about the queued lua console cmd)

Closes #449
Closes #441 the panichandler is fixed in this PR

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[boubouleuh]

When trying to add more than one event timer it break tho idk how to fix 🫡

[boubouleuh]

seems like i found the issues now it doesnt crash anymore