Progress Overhaul + Profile Page and a LOT more! (#4262)

Co-authored-by: Amelia <77553571+Fesaa@users.noreply.github.com>
Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/Entities/Progress/AppUserProgress.cs

@@ -0,0 +1,72 @@
+using System;
+using API.Entities.Interfaces;
+
+namespace API.Entities.Progress;
+
+/// <summary>
+/// Represents the progress a single user has on a given Chapter.
+/// </summary>
+public class AppUserProgress : IEntityDate
+{
+    /// <summary>
+    /// Id of Entity
+    /// </summary>
+    public int Id { get; set; }
+    /// <summary>
+    /// Pages Read for given Chapter
+    /// </summary>
+    public int PagesRead { get; set; }
+    /// <summary>
+    /// Volume belonging to Chapter
+    /// </summary>
+    public int VolumeId { get; set; }
+    /// <summary>
+    /// Series belonging to Chapter
+    /// </summary>
+    public int SeriesId { get; set; }
+    /// <summary>
+    /// Library belonging to Chapter
+    /// </summary>
+    public int LibraryId { get; set; }
+    /// <summary>
+    /// Chapter
+    /// </summary>
+    public int ChapterId { get; set; }
+    /// <summary>
+    /// For Book Reader, represents the nearest passed anchor on the screen that can be used to resume scroll point
+    /// on next load
+    /// </summary>
+    public string? BookScrollId { get; set; }
+    /// <summary>
+    /// When this was first created
+    /// </summary>
+    public DateTime Created { get; set; }
+    /// <summary>
+    /// Last date this was updated
+    /// </summary>
+    public DateTime LastModified { get; set; }
+    /// <summary>
+    /// Total times the underlying Chapter has been fully read
+    /// </summary>
+    public int TotalReads { get; set; } = 0;
+
+    public DateTime CreatedUtc { get; set; }
+    public DateTime LastModifiedUtc { get; set; }
+
+
+    // Relationships
+    /// <summary>
+    /// Navigational Property for EF. Links to a unique AppUser
+    /// </summary>
+    public AppUser AppUser { get; set; } = null!;
+    /// <summary>
+    /// User this progress belongs to
+    /// </summary>
+    public int AppUserId { get; set; }
+
+    public void MarkModified()
+    {
+        LastModified = DateTime.Now;
+        LastModifiedUtc = DateTime.UtcNow;
+    }
+}