Add function headers

[pixlcrashr]

Add function headers in format:

For example:

/*
    Author(s):
        Vincent Heins
    Description:
         Checks whether a vehicle can be flipped or not.
    Parameter(s):
        (_this select 0) : <objNull> : Vehicle to flip
    Result:
        <bool> : can the vehicle be flipped?
    Example(s):
        {
            hint str ([(vehicle player)] call lilc_actions_fnc_canFlipVehicle);
        }
*/