Add mana regeneration code in \Workspace\Entry\ManaRegen.h

The work is done.

src/Union_IkarusDestroyer/Workspace/Entry/ManaRegen.h

@@ -0,0 +1,25 @@
+namespace NAMESPACE
+{
+	CSubscription regenerateMana(ZSUB(Loop), []()
+		{
+			if (!ogame || ogame->singleStep || !player || player->attribute[NPC_ATR_HITPOINTS] <= 0)
+				return;
+
+			static int timer = 0;
+			timer += ztimer->frameTime;
+
+			if (timer < Settings::TickRate)
+				return;
+
+			timer -= Settings::TickRate;
+
+			const int manaMax = player->attribute[NPC_ATR_MANAMAX];
+			int& mana = player->attribute[NPC_ATR_MANA];
+
+			if (manaMax < Settings::Threshold)
+				return;
+
+			mana += Settings::PerTick ? Settings::PerTick : (manaMax / Settings::Divisor);
+			mana = CoerceInRange(mana, 0, 0, manaMax);
+		});
+}