[Quest API] Add IsBoat()/IsControllableBoat() to Perl/Lua (#4151)

- Add `$mob->IsBoat()`.
- Add `$mob->IsControllableBoat()`.

- Add `mob:IsBoat()`.
- Add `mob:IsControllableBoat()`.

- Allows operators to determine if a mob is a boat or a controllable boat.

zone/lua_mob.h

@@ -578,6 +578,8 @@ public:
 	bool IsPetOwnerClient();
 	bool IsPetOwnerNPC();
 	bool IsDestructibleObject();
+	bool IsBoat();
+	bool IsControllableBoat();
 };
 
 #endif