new event onRotateItem

[lucasgrizante]

Before creating an issue, please ensure:

• This is a bug in the software that resides in this repository, and not a
  support matter (use https://otland.net/forums/support.16/ for support)
• This issue is reproducible without changes to the C++ code in this repository

This is not a bug, but a feature request.
I'd like a new event "onRotateItem" that will be executed after player rotates an object.

Why?
I'm trying to make a statue in my temple using the new Podium feature. I could limit players to not move/edit it using already available events (onMoveItem, onPodiumRequest and onPodiumEdit), yet, they can rotate it (and I think there's no way without editing sources to limit that).

[EPuncker]

this is pretty interesting because podium is the only item that rotates, but actually doesn't rotate. we only rotate outfit direction on it 🤔

we should really add a house check here:

forgottenserver/src/game.cpp

Line 2379 in e20bc71

if (!item || item->getClientID() != spriteId || (!item->isRotatable() && !item->isPodium()) || item->hasAttribute(ITEM_ATTRIBUTE_UNIQUEID)) {

to allow rotating a podium only if it is located inside a house tile

but accordingly to the code I referenced, you could just add an unique ID to podium and it will become not rotatable