feat(Core/Unit): New helper HasActivePowerType and script hook OnPlayerHasActivePowerType (#18293)

* Create HasActivePower for script intercept

* Replace relevant player-related getPowerType() comparators with HasActivePowerType

* Change OnPlayerHasActivePowerType to regular bool instead of optional

---------

Co-authored-by: NathanHandley <nathanhandley@protonmail.com>

src/server/game/Entities/Player/Player.h

@@ -1170,6 +1170,8 @@ public:
 
     void InitStatsForLevel(bool reapplyMods = false);
 
+    [[nodiscard]] bool HasActivePowerType(Powers power) override;
+
     // .cheat command related
     [[nodiscard]] bool GetCommandStatus(uint32 command) const { return _activeCheats & command; }
     void SetCommandStatusOn(uint32 command) { _activeCheats |= command; }