Added new Game logic library to assist with game projects

OmegaLeo.HelperLib.Game/Utilities/WeightedPicker.cs

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+using System.Collections.Generic;
+using System.Linq;
+using NetFlow.DocumentationHelper.Library.Attributes;
+using OmegaLeo.HelperLib.Game.Models;
+
+namespace OmegaLeo.HelperLib.Game.Utilities
+{
+    public static class WeightedPicker
+    {
+        [Documentation("WeightedPicker.Pick", "Picks a random item from a dictionary of items with associated weights.")]
+        public static T Pick<T>(RandomNumberGenerator rng, Dictionary<T, float> weights)
+        {
+            float total = weights.Values.Sum();
+            float roll = rng.Range(0f, total);
+
+            foreach (var pair in weights)
+            {
+                roll -= pair.Value;
+                if (roll <= 0)
+                    return pair.Key;
+            }
+
+            return weights.Keys.Last(); // fallback
+        }
+    }
+}