docs: update XML comments for Essentials Core

src/PepperDash.Essentials.Core/Devices/IDspPresets.cs

@@ -8,8 +8,15 @@ namespace PepperDash.Essentials.Core
     /// </summary>
     public interface IDspPresets
     {
+        /// <summary>
+        /// Gets the Presets
+        /// </summary>
         Dictionary<string, IKeyName> Presets { get; }
 
+        /// <summary>
+        /// Recalls the preset by key
+        /// </summary>
+        /// <param name="key">key of preset to recall</param>
         void RecallPreset(string key);
     }
 }