Made progress on implementing some shops.

Performed some folder restructuring as well.

Props-Modules/Props.Shop/Adafruit/Options/SimilarityOption.cs

@@ -0,0 +1,35 @@
+using System;
+using Props.Shop.Framework;
+
+namespace Props.Shop.Adafruit.Options
+{
+    public class SimilarityOption : IOption
+    {
+        private Configuration configuration;
+        public string Name => "Query Similarity";
+
+        public string Description => "The minimum level of similarity for a listing to be returned.";
+
+        public bool Required => true;
+
+        public Type Type => typeof(float);
+
+        internal SimilarityOption(Configuration configuration)
+        {
+            this.configuration = configuration;
+        }
+
+        public string GetValue()
+        {
+            return configuration.Similarity.ToString();
+        }
+
+        public bool SetValue(string value)
+        {
+            float parsed;
+            bool success = float.TryParse(value, out parsed);
+            configuration.Similarity = parsed;
+            return success;
+        }
+    }
+}