Added basic features

Assets/Scripts/Health.cs

@@ -0,0 +1,28 @@
+using UnityEngine;
+
+public class Health : MonoBehaviour, IDamageable
+{
+    private float _currentHealth;
+
+    [SerializeField]
+    private float _maxHealth = 100.0f;
+
+    public event DamageEventHandler OnDamageTaken;
+
+    private void Awake()
+    {
+        _currentHealth = _maxHealth;
+    }
+
+    public void Damage(float damageAmount)
+    {
+        var oldHealth = _currentHealth;
+        _currentHealth -= damageAmount;
+        OnDamageTaken?.Invoke(new DamageData
+        {
+            oldHealth = oldHealth,
+            newHealth = _currentHealth,
+            damageAmount = damageAmount
+        });
+    }
+}