Implement KashCheery's timerfix's features

[Zorono]

#define GetTimerRemainingTime GetTimerRemaining
native KillAllTimers();
native IsTimerRunning(Timer:timerid);
native IsTimerPaused(Timer:timerid);
native PauseTimer(Timer:timerid);
native ContinueTimer(Timer:timerid);
native GetTimerInterval(Timer:timerid);
native SetTimerInterval(Timer:timerid, interval);
native GetTimerRemaining(Timer:timerid);
native GetRunningTimersCount();

stock bool:ToggleTimerPause(Timer:timerid)
{
    if(!IsValidTimer(timmerid))
        return false;
        
    if(IsTimerPaused(timerid))
        ContinueTimer(timerid);
    else
        PauseTimer(timerid);
    
    return true;
}

this is a fork of @NoPressF 's #1087

TODO:

native AddTimerHandler(Timer:timerid, handler[]);
native RemoveTimerHandler(Timer:timerid, handler[]);
native SetTimerDelay(Timer:timerid, delay);

[AmyrAhmady]

You're mixing tabs and spaces A LOT for whatever reason which is not acceptable.
You also have errors in your code you need to fix first. The review can only begin if ci runners build it successfully and pass.

[AmyrAhmady]

You must add the new functions in ITimer to the end, you're breaking the vtable's order

[Zorono]

opening a new one at a later time due to conflicts and postponed requested changes