Add MeleeEffect and related services for combat interactions

GameCore/Combat/Effects/MeleeEffect.cs

@@ -0,0 +1,29 @@
+using GameCore.Combat.Interfaces;
+using GameCore.Input;
+
+namespace GameCore.Combat.Effects;
+
+public class MeleeEffect(float range, float radius) : IEffect
+{
+    public void Execute(EffectContext context)
+    {
+        var input = context.World.GetComponent<InputStateComponent>(context.Owner);
+        var weapon = context.World.GetComponent<WeaponComponent>(context.Owner);
+        if (input == null || weapon == null) return;
+
+        var checkPosition = input.MuzzlePosition + input.MuzzleDirection * range;
+        var hits = context.World.WorldQuery.OverlapSphere(checkPosition, radius, context.Owner);
+
+        foreach (var hitEntity in hits)
+        {
+            var hitContext = new EffectContext
+            {
+                World = context.World,
+                Owner = context.Owner,
+                Target = hitEntity
+            };
+
+            foreach (var effect in weapon.OnHitEffects) effect.Execute(hitContext);
+        }
+    }
+}