UI fixes, add npc base class

Assets/Scripts/Characters/StringStat.cs

@@ -0,0 +1,18 @@
+using Assets.Scripts.Interfaces;
+
+public class StringStat : IStringStat
+{
+    public string Name { get; private set; }
+    public string Value { get; private set; }
+
+    public StringStat(string name, string startValue)
+    {
+        Name = name;
+        Value = startValue;
+    }
+
+    public void SetValue(string value)
+    {
+        Value = value;
+    }
+}