ElectronNET.API: Move API code to subfolder

src/ElectronNET.API/API/Entities/IPostData.cs

@@ -0,0 +1,16 @@
+namespace ElectronNET.API.Entities
+{
+    /// <summary>
+    /// Interface to use Electrons PostData Object
+    /// </summary>
+    public interface IPostData
+    {
+        /// <summary>
+        /// One of the following:
+        /// rawData - <see cref="UploadRawData"/> The data is available as a Buffer, in the rawData field.
+        /// file - <see cref="UploadFile"/> The object represents a file. The filePath, offset, length and modificationTime fields will be used to describe the file.
+        /// blob - <see cref="Blob"/> The object represents a Blob. The blobUUID field will be used to describe the Blob.
+        /// </summary>
+        public string Type { get; }
+    }
+}