Add GameHud component to display player stats; include experience, coins, round time left, and health

Assets/Data/Waves/Basic Wave.asset

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Assets/Scenes/main.unity

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+  healthSlider: {fileID: 2032896404}
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Assets/Scripts/Systems/GameManager.cs

@@ -25,6 +25,7 @@ namespace Systems
         public float RoundTime => roundTime;
         public int MaxRounds => maxRounds;
         public bool StoreIsClosed { get; set; } = true;
+        public float RoundTimeLeft => Mathf.Max(0, timer);
 
         public event Action<int> OnRoundStart;
         public event Action<int> OnRoundEnd;

Assets/Scripts/UI.meta

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+fileFormatVersion: 2
+guid: 72517a62486742de96c31c1f3a3a58d5
+timeCreated: 1752332352

Assets/Scripts/UI/GameHud.cs

@@ -0,0 +1,28 @@
+using System;
+using Systems;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace UI
+{
+    public class GameHud : MonoBehaviour
+    {
+        [SerializeField] private TextMeshProUGUI expText;
+        [SerializeField] private TextMeshProUGUI coinsText;
+        [SerializeField] private TextMeshProUGUI roundTimeLeftText;
+        [SerializeField] private Slider healthSlider;
+
+        private void Update()
+        {
+            var player = GameManager.Instance.Player;
+            if (!player) return;
+            
+            expText.text = $"EXP: {player.attributes.Experience}";
+            coinsText.text = $"Coins: {GameManager.Instance.Coins}";
+            roundTimeLeftText.text = $"{GameManager.Instance.RoundTimeLeft:F1}s";
+            healthSlider.maxValue = player.attributes.MaxHealth;
+            healthSlider.value = player.attributes.Health;
+        }
+    }
+}

Assets/Scripts/UI/GameHud.cs.meta

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+fileFormatVersion: 2
+guid: f17a4078172c4757abde33b7929f180e
+timeCreated: 1752332367