docs: complete XML documentation for all projects with inheritdoc tags

Co-authored-by: andrew-welker <1765622+andrew-welker@users.noreply.github.com>

src/PepperDash.Essentials.MobileControl/UserCodeChangedContent.cs

@@ -2,12 +2,21 @@
 
 namespace PepperDash.Essentials
 {
+    /// <summary>
+    /// Represents a UserCodeChangedContent
+    /// </summary>
     public class UserCodeChangedContent
     {
         [JsonProperty("userCode")]
+        /// <summary>
+        /// Gets or sets the UserCode
+        /// </summary>
         public string UserCode { get; set; }
 
         [JsonProperty("qrChecksum", NullValueHandling = NullValueHandling.Include)]
+        /// <summary>
+        /// Gets or sets the QrChecksum
+        /// </summary>
         public string QrChecksum { get; set; }
     }
 }