tweak(ProcessClonePacket): add entityCreationFailed event

[Kuuzoo]

Goal of this PR

This PR aims to enhance the server's handling of scenarios where a entity cannot be spawned due to lockdown mode constraints.

How is this PR achieving the goal

This PR introduces a new server event, entityCreationFailed, which is triggered when a entity spawn attempt fails. The event provides detailed information about the failure, including:

---@param entity number The entity handle that failed to be created; Using this handle will not work, as the entity does not exist at this point.
---@param reason 'LockdownMode' | 'OnEntityCreate' | 'EntityValidation' The reason why the entity creation failed.
---@param playerId number The player ID that attempted to create the entity.
AddEventHandler('entityCreationFailed', function(entity, reason, playerId)
  print(('Entity creation failed: %s, player %s, reason %s'):format(entity, playerId, reason));
end);

This PR applies to the following area(s)

Server

Successfully tested on

Game builds: No relation to gamebuilds

Platforms: Windows

Checklist

• Code compiles and has been tested successfully.
• Code explains itself well and/or is documented.
• My commit message explains what the changes do and what they are for.
• No extra compilation warnings are added by these changes.