Function: AddHate(Spawn, NPC, Amount, SendPacket)
Description: Add or Remove hate from a Spawn or Spell Targets if in a LUA Spell.
Parameters:
Spawn: Spawn - The target involved for the hate to be added.NPC: Spawn - NPC related to the hate list we want to update.Amount: SInt32 - The amount of hate to add or subtract (negative to remove hate).SendPacket: UInt8 - Default is false, if set to 1 then we will send the threat packet to the client if in a lua spell.
Returns: None.
Spell caster lifetime: When this function reads a spell's caster, it retains that allocation for the native operation. Retirement or callback reentry cannot replace its caster with a different allocation at the same address or runtime ID. A known expired or cleared caster is not rediscovered through a replacement connection. An actor already owned by the active callback remains usable through that callback. See Lua actor lifetime.
Original spell targets: When this function uses a spell's target list, it snapshots references to the originally selected actor allocations. It skips unavailable or departed targets instead of selecting another actor with a reused runtime ID. Accepted actors remain physically retained through the active protected callback, including Lua errors; saved userdata and target records do not keep them alive between callbacks. Explicit Spawn arguments retain their existing selection behavior. See Lua actor lifetime.