Re-add performance thresholds and add whitelist/blacklist options

MareSynchronos/MareConfiguration/Models/ServerBlockStorage.cs

@@ -0,0 +1,8 @@
+namespace MareSynchronos.MareConfiguration.Models;
+
+[Serializable]
+public class ServerBlockStorage
+{
+    public List<string> Whitelist { get; set; } = new();
+    public List<string> Blacklist { get; set; } = new();
+}