ElectronNET.API: Move API code to subfolder

src/ElectronNET.API/API/Entities/FocusOptions.cs

@@ -0,0 +1,15 @@
+namespace ElectronNET.API.Entities
+{
+    /// <summary>
+    /// Controls the behavior of <see cref="App.Focus(FocusOptions)"/>.
+    /// </summary>
+    public class FocusOptions
+    {
+        /// <summary>
+        /// Make the receiver the active app even if another app is currently active.
+        /// <para/>
+        /// You should seek to use the <see cref="Steal"/> option as sparingly as possible.
+        /// </summary>
+        public bool Steal { get; set; }
+    }
+}