Add XML docs

RemoteExec.Shared/RemoteExecutionResult.cs

@@ -1,7 +1,17 @@
 namespace RemoteExec.Shared;
 
+/// <summary>
+/// Represents the result of a remote method execution.
+/// </summary>
 public sealed class RemoteExecutionResult
 {
+    /// <summary>
+    /// Gets or sets the return value of the executed method, or null if the method returns void.
+    /// </summary>
     public object? Result { get; set; }
+
+    /// <summary>
+    /// Gets or sets the exception message if the execution failed, or null if successful.
+    /// </summary>
     public string? Exception { get; set; }
 }