ElectronNET.API: Move API code to subfolder

src/ElectronNET.API/API/Entities/OnDidFailLoadInfo.cs

@@ -0,0 +1,18 @@
+namespace ElectronNET.API.Entities;
+
+/// <summary>
+/// 'OnDidFailLoad' event details.
+/// </summary>
+public class OnDidFailLoadInfo
+{
+    /// <summary>
+    /// The full list of error codes and their meaning is available here
+    /// https://source.chromium.org/chromium/chromium/src/+/main:net/base/net_error_list.h
+    /// </summary>
+    public int ErrorCode { get; set; }
+
+    /// <summary>
+    /// Validated URL.
+    /// </summary>
+    public string ValidatedUrl { get; set; }
+}