Preparation fo Mystery rolling

ALttPRandomizer/Randomizers/MysteryRandomizer.cs

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+namespace ALttPRandomizer.Randomizers {
+    using System;
+    using System.Linq;
+    using ALttPRandomizer.Model;
+
+    public class MysteryRandomizer {
+        private static readonly Random random = new();
+
+        public SeedSettings Roll(MysterySettings mystery, SeedSettings initialSettings) {
+            var mysteryFields = typeof(MysterySettings).GetProperties();
+            var settingsFields =
+                typeof(SeedSettings).GetProperties()
+                    .ToDictionary(field => field.Name, field => field);
+
+            foreach (var field in mysteryFields) {
+                if (!settingsFields.ContainsKey(field.Name)) {
+                    continue;
+                }
+
+                var value = field.GetValue(mystery);
+
+                if (value is IRandomizableWeights weights && !weights.IsEmpty) {
+                    settingsFields[field.Name].SetValue(initialSettings, weights.Roll());
+                }
+            }
+
+            return initialSettings;
+        }
+    }
+}