feat(Scripting/Spell): Add new hooks for Spell (OnSpellCast, OnSpellPrepare, OnSpellCancel) (#21149)

src/server/game/Spells/Spell.cpp

@@ -3717,6 +3717,8 @@ SpellCastResult Spell::prepare(SpellCastTargets const* targets, AuraEffect const
             TriggerGlobalCooldown();
     }
 
+    sScriptMgr->OnSpellPrepare(this, m_caster, m_spellInfo);
+
     return SPELL_CAST_OK;
 }
 
@@ -3788,6 +3790,8 @@ void Spell::cancel(bool bySelf)
     //set state back so finish will be processed
     m_spellState = oldState;
 
+    sScriptMgr->OnSpellCastCancel(this, m_caster, m_spellInfo, bySelf);
+
     finish(false);
 }
 
@@ -4114,6 +4118,8 @@ void Spell::_cast(bool skipCheck)
         if (m_caster->ToPlayer()->GetCommandStatus(CHEAT_COOLDOWN))
             m_caster->ToPlayer()->RemoveSpellCooldown(m_spellInfo->Id, true);
 
+    sScriptMgr->OnSpellCast(this, m_caster, m_spellInfo, skipCheck);
+
     SetExecutedCurrently(false);
 }