Implement basic structure for combat system and refactor code

Assets/Scripts/Combat/CombatantState.cs

@@ -0,0 +1,28 @@
+using System.Collections.Generic;
+using KernelPanic.Core;
+
+namespace KernelPanic.Combat
+{
+    /// <summary>
+    /// Stores mutable combat stats and statuses for a player or enemy.
+    /// </summary>
+    public sealed class CombatantState
+    {
+        private readonly Dictionary<StatusType, int> activeStatuses = new();
+
+        public CombatantState(int maxUptime, int ram, int cycles)
+        {
+            MaxUptime = maxUptime;
+            CurrentUptime = maxUptime;
+            Ram = ram;
+            Cycles = cycles;
+        }
+
+        public int CurrentUptime { get; set; }
+        public int MaxUptime { get; set; }
+        public int Shield { get; set; }
+        public int Ram { get; set; }
+        public int Cycles { get; set; }
+        public IReadOnlyDictionary<StatusType, int> ActiveStatuses => activeStatuses;
+    }
+}