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/Controllers/ActivityController.cs

@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using API.Constants;
+using API.Data;
+using API.DTOs.Progress;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace API.Controllers;
+
+public class ActivityController(IUnitOfWork unitOfWork) : BaseApiController
+{
+    /// <summary>
+    /// Returns active reading sessions on the Server
+    /// </summary>
+    /// <returns></returns>
+    [Authorize(PolicyGroups.AdminPolicy)]
+    [HttpGet("current")]
+    public async Task<ActionResult<List<ReadingSessionDto>>> GetActiveReadingSessions()
+    {
+        return Ok(await unitOfWork.ReadingSessionRepository.GetAllReadingSessionAsync());
+    }
+}