Implements BattleRandom class with support for Effect Chance, and script hooks to modify this.

src/Battling/Models/BattleRandom.cpp

@@ -0,0 +1,10 @@
+#include "BattleRandom.hpp"
+#include "Creature.hpp"
+#include "ExecutingAttack.hpp"
+
+bool CreatureLib::Battling::BattleRandom::EffectChance(float chance, ExecutingAttack* attack, Creature* target) {
+    HOOK(ModifyEffectChance, attack, attack, target, &chance);
+    HOOK(ModifyIncomingEffectChance, target, attack, target, &chance);
+    chance /= 100;
+    return _random.GetFloat() < chance;
+}