Started laying out the entities

API/Entities/Annotation.cs

@@ -0,0 +1,45 @@
+using System;
+using API.Entities.Enums;
+using API.Entities.Interfaces;
+
+namespace API.Entities;
+
+/// <summary>
+/// Represents an annotation in the Epub reader
+/// </summary>
+public class Annotation : IEntityDate
+{
+    public int Id { get; set; }
+    /// <summary>
+    /// Starting point of the Highlight
+    /// </summary>
+    public required string XPath { get; set; }
+    /// <summary>
+    /// Ending point of the Hightlight. Can be the same as <see cref="XPath"/>
+    /// </summary>
+    public string EndingXPath { get; set; }
+
+    /// <summary>
+    /// The text selected.
+    /// </summary>
+    public string SelectedText { get; set; }
+    /// <summary>
+    /// The number of characters selected
+    /// </summary>
+    public int HighlightCount { get; set; }
+
+    public HightlightColor HightlightColor { get; set; }
+
+    public required int SeriesId { get; set; }
+    public required int VolumeId { get; set; }
+    public required int ChapterId { get; set; }
+    public Chapter Chapter { get; set; }
+
+    public required int AppUserId { get; set; }
+    public AppUser AppUser { get; set; }
+
+    public DateTime Created { get; set; }
+    public DateTime CreatedUtc { get; set; }
+    public DateTime LastModified { get; set; }
+    public DateTime LastModifiedUtc { get; set; }
+}