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/DTOs/Statistics/ReadingActivityGraphDto.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+
+namespace API.DTOs.Statistics;
+#nullable enable
+
+public sealed record ReadingActivityGraphEntryDto
+{
+    public DateTime Date { get; set; }
+
+    public int TotalTimeReadingSeconds { get; set; }
+    public int TotalPages { get; set; }
+    public int TotalWords { get; set; }
+    public int TotalChaptersFullyRead { get; set; }
+}
+
+public class ReadingActivityGraphDto : Dictionary<string, ReadingActivityGraphEntryDto>;