Add possible missing files (I don't trust git move).

Aaru.Server.Old/Areas/Admin/Controllers/MmcFeaturesController.cs

@@ -0,0 +1,28 @@
+using Aaru.CommonTypes.Metadata;
+using DbContext = Aaru.Server.Old.Database.DbContext;
+
+namespace Aaru.Server.Old.Areas.Admin.Controllers;
+
+[Area("Admin")]
+[Authorize]
+public sealed class MmcFeaturesController : Controller
+{
+    readonly DbContext _context;
+
+    public MmcFeaturesController(DbContext context) => _context = context;
+
+    // GET: Admin/MmcFeatures
+    public async Task<IActionResult> Index() => View(await _context.MmcFeatures.ToListAsync());
+
+    // GET: Admin/MmcFeatures/Details/5
+    public async Task<IActionResult> Details(int? id)
+    {
+        if(id == null) return NotFound();
+
+        MmcFeatures mmcFeatures = await _context.MmcFeatures.FirstOrDefaultAsync(m => m.Id == id);
+
+        if(mmcFeatures == null) return NotFound();
+
+        return View(mmcFeatures);
+    }
+}